Mail and news settings
From MozillaZine Knowledge Base
Jump to navigationJump to search
This article provides a short description of all the mail and news specific settings for Thunderbird. Most of that information should also apply to Mozilla Suite and SeaMonkey but there is no attempt to document that. It is a supplement to About:config entries which describes most of the settings for Mozilla applications. Settings for Lightning (calendar) are also documented, even though it is an extension.
This web page is just documentation, it can't be used to modify your settings. See Modify Thunderbird settings for how to use the Config editor to modify the settings documented in this article.
Spaces were added on both sides of any dots in the settings name to let the words wrap. They don't exist in the actual settings. Editors need to be careful to follow this convention to avoid forcing readers to horizontally scroll this article.
A user may have multiple accounts, servers, and identities, each of which has a decimal id appended to the name. "#" is used to represent that. For example both mail.server.server1.ageLimit and mail.server.server23.ageLimit would be documented by mail.server.server#.ageLimit.
This article will always be incomplete. The "mailnews.js" file in the defaults\pref subdirectory in the Thunderbird program directory defines the default values for most of the mail and news settings. Those settings are shared by multiple applications. The "all-thunderbird.js" file in the same directory overrides some of those settings, and adds some settings unique to Thunderbird. These files are now physically stored within omni.ja (was initially called omni.jar) to improve performance. You can examine its contents using any program that knows how to open a Zip archive file. Not every setting has a default value. These additional settings are supported but need to be added if you want to use them. Usually somebody finds out about them by reading bug reports where a developer mentions the setting and what release/build they would first occur in. You can also search for settings using the Mozilla cross-reference though that doesn't guarantee any you find would be used by Thunderbird. For example, the open source version of Eudora and the Penelope extension have a few settings that Thunderbird doesn't use.
Calendar.
| Name | Type | Meaning of values |
|---|---|---|
| calendar . alarms . defaultsnoozelength | Integer | Default snooze length in minutes. Defaults to 5 minutes |
| calendar . alarms . eventalarmlen | Integer | Defaults to 15. |
| calendar . alarms . eventalarmunit | String | Defaults to "minutes" |
| calendar . alarms . onforevents | Integer | Defaults to 0. |
| calendar . alarms . onfortodos | Integer | Defaults to 0. |
| calendar . alarms . show | Boolean | True (default): Show alarms. False: Don't show alarms. |
| calendar . alarms . showmissed | Boolean | True (default): Show missed alarms False: Opposite of the above |
| calendar . alarms . soundURL | String | Defaults to "chrome://calendar/content/sound.wav" |
| calendar . alarms . playsound | Boolean | True (default): False: |
| calendar . alarms . todoalarmlen | Integer | Defaults to 15. |
| calendar . alarms . todoalarmunit | String | Defaults to "minutes". |
| calendar . autorefresh . enabled | Boolean | True (default): False: Opposite of the above |
| calendar . autorefresh . timeout | Integer | Defaults to 30. |
| calendar . categories . names | String | Defaults to a blank string. |
| calendar . category . color . <category-name> | String | Which color to use for this category (in #RRGGBB format) Defaults to undefined = (none) |
| calendar . date . format | Integer | Defaults to 0 |
| calendar . event . defaultlength | Integer | Default length of an event in minutes (Defaults to 60) |
| calendar . google . calPrefs . email_address | String | |
| calendar . google . useHTTPMethodOverride | Boolean | |
| calendar . google . alarmClosest | Boolean | |
| calendar . google . defaultPrivacy | Boolean | |
| calendar . google . sendEventNotifications | Boolean | |
| calendar . previousweeks . inview | Integer | Number of past weeks to display in the multiweek view (Defaults to 0) |
| calendar . registry . * | The "Properties" of your calendars (the next part of the preference name is a GUID in the form {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx} where the x's are hex digits — one GUID per calendar) | |
| calendar . timezone . local | String | Your local timezone (e.g. Europe/Paris) |
| calendar . view . daystarthour | Integer | "Day starts at" (Defaults to 8 = 8am) Note: Day must start and end at an integer hour ("I work from 8:30 am to 5:30 pm" cannot be implemented) |
| calendar . view . dayendhour | Integer | "Day ends at" (Defaults to 17 = 5pm) |
| calendar . view . visiblehours | Integer | "Show … hours at a time" (Defaults to 9) |
| calendar . week . start | Integer | What day of the week does the week start. 0 (default): Sunday. 1: Monday 2: Tuesday and so forth |
| calendar . weeks . inview | Integer | Number of weeks in the multiweek view (Defaults to 4) |
| calendar . week . d0sundaysoff | Boolean | False: Sunday is a workday. True (default): Opposite of the above. |
| calendar . week . d1mondaysoff | Boolean | False (default): Monday is a workday. True: Opposite of the above. |
| calendar . week . d2tuesdaysoff | Boolean | False (default): Tuesday is a workday. True: Opposite of the above. |
| calendar . week . d3wednesdaysoff | Boolean | False (default): Wednesday is a workday. True: Opposite of the above. |
| calendar . week . d4thursdaysoff | Boolean | False (default): Thursday is a workday. True: Opposite of the above. |
| calendar . week . d5fridaysoff | Boolean | False (default): Friday is a workday. True: Opposite of the above. |
| calendar . week . d6saturdaysoff | Boolean | False: Saturday is a workday. True (default): Opposite of the above. |
Mail.
| Name | Type | Meaning of values |
|---|---|---|
| mail . accountmanager . accounts | String | Comma separated list of existing accounts. If its not listed here its ignored. |
| mail . accountmanager . appendaccounts | String | Comma separated list of pre-configured accounts that a ISP / Vendor wants to add to the existing accounts list |
| mail . accountmanager . defaultaccount | String | Name of default account. |
| mail . accountmanager . localfoldersserver | String | Name of the pseudo account for Local Folders. |
| mail . account . account# . identities | String | Comma separated list of identities. If its not listed here its ignored. See Multiple identities per e-mail account. |
| mail . account . account# . server | String | The server# associated with this account. |
| mail . adaptivefilters . junk_threshold | Integer | If a message has a number higher than this number its considered junk. Lowering the number makes the Bayesian filtering learn faster, but increases the risk of mistakes. Defaults to 90. See Junk Mail Controls |
| mail . addr_book . displayName . autoGeneration | Boolean | True (default): Automatically generate a display name based on first name and last name fields False: Don't generate a name |
| mail . addr_book . displayName . lastnamefirst | String | "true": Display as "Last name, first name" "false": Display as "First name last name" Note: This is a locale-specific string representing a boolean value; it defaults to "false" for en-US and must not be translated for other locales. |
| mail . addr_book . lastnamefirst | Integer | Changes the sort order 0 (default): Display name as given 1: Last name, first name 2: First name, last name |
| mail . addr_book . mapit_url . format | String | URL to display location from address book entry. If its set to a empty string the "get map" button won't be displayed in the address pane. [1]. The format is @A1: address, part 1 @A2: address, part 2 @CI: city @ST: state @ZI: zip code @CO: country |
| mail . addr_book . quicksearchquery . format | String | Every @V will be replaced with the value typed in the quick search bar in the address book. "and", "or" and "not" are valid. "c" means contains. [2] Defaults to ?(or(PrimaryEmail,c,@V) (DisplayName,c,@V) (FirstName,c,@V) (LastName,c,@V)) |
| mail . addr_book . show_phonetic_fields | String | "true": Display the phonetic equivalents of first name and last name in the address book "false": Display names literally Note: This is a locale-specific string representing a boolean value; it defaults to "false" for en-US and must not be translated for other locales. |
| mail . append_preconfig_smtpservers . version | Integer | Version number incremented whenever a pre-configured SMTP server is added. Defaults to 1. |
| mail . attach_vcard | Boolean | True: User's vcard (if it exists) is automatically appended to messages and posts. False: Doesn't append it. |
| mail . auth_login | Boolean | True (default): Enable SASL. False: Disable SASL. Sometimes when your email provider uses load-balancing and not every mail server supports SASL you need to set both this setting and mail . server . default . auth_login false. You could also use it to disable SMTP AUTH. [3] |
| mail . autoComplete . highlightNonMatches | Boolean | True (default): Flashes red for non-matches False: Will still auto-complete, but won't flag non-matches. |
| mail . auto_quote | Boolean | True: Automatically include the contents of the original message in replies. False: Leave the contents of the original message out of the reply. |
| mail . biff . animate_dock_icon | Boolean | True (default): False |
| mail . biff . play_sound | Boolean | True - play a sound when new mail is detected (default): False - do nothing |
| mail . biff . play_sound . type | Integer | 0 - Use system sound if mail.biff.play_sound is enabled (default): 1 - Use the specified sound file |
| mail . biff . play_sound . url | String | What .wav file to use (instead of the system sound) when playing sounds to alert the user of new mail |
| mail . biff . show_alert | Boolean | True - Display a new mail alert popup (default): False - do nothing |
| mail . biff . show_balloon | Boolean | True : Use balloon tips to notify new messages (Windows only) [4] False (default): Use the popup notification (if its enabled). |
| mail . biff . show_tray_icon | Boolean | True (default): False |
| mail . chat_enabled | Boolean | True (default): Chat enabled. False : Disable chat component. |
| mail. chat . play_notification_sound | Boolean | True (Default): Play sound when new chat message received . False: Don't use an audible alert. [5] |
| mail . check_all_imap_folders_for_new | Boolean | True: Check every folder for new messages. False (default): Rely upon "Check this folder for new messages" being checked in the folders properties. [6] |
| mail . cloud_files.enabled | Boolean | True (default): Large attachments can be stored with on-line ("cloud") services False: Attachments must be stored within the message. |
| mail . citation_color | String | Default RGB color of the original message text in replies or forwards. |
| mail . collect_addressbook | String | Address book that collected addresses should be added to. It defaults to moz-abmdbdirectory://abook.mab (the personal address book). |
| mail . collect_email_address_incoming | Boolean | True: Add addresses from received messages false (Default): Don't add addresses from received messages. |
| mail . collect_email_address_newsgroup | Boolean | True: Add addresses from received posts false (Default): Don't add addresses from received posts |
| mail . collect_email_address_outgoing | Boolean | True: Add addresses from outgoing messages false (Default): Don't add addresses from outgoing messages. |
| mail . compose . add_undisclosed_recipients | Boolean | Used when there are no disclosed recipients (only bcc). Originally intended to work around bugs in some mail servers that disclosed the recipients. True (default): Display "undisclosed-recipients" as the address for To: False: Do not display "undisclosed-recipients:" See also [bug #1318964]. |
| mail . compose . autosave | Boolean | True (default): Periodically save the message being composed as a draft False: Does nothing. |
| mail . compose . autosaveinterval | Integer | How often it should save the message as a draft. Defaults to every 5 minutes. |
| mail . compose . dont_attach_source_of_local_network_links | Boolean | Windows specific. True (default): Don't include the computer name in the pathname. False: Use the full UNC. (file://///<computer name> / <path> / <file name>) |
| mail . compose . max_recycled_windows | Integer | If set to a number greater than zero, compose windows will be recycled quicker. Defaults to 0. |
| mail . compose . other . header | String | Comma separated list of optional headers that are used in searches, message filters, and show up in the address picker when composing a message. Don't include the colon in the name of the header. Replaced with mailnews.customHeaders in 3.0 |
| mail . compose . wrap_to_window_width | Boolean | True: Wrap to window width when composing a new message False (default): Don't wrap to window width when composing a new message. |
| mail . content_disposition_type | Integer | 0 (default): May send attachments such as a plain text file inline (part of the message body). 1: Send attachments as real attachments. |
| mail . correct_threading | Boolean | |
| mail . crypto_sign_outgoing_mail | Boolean | True: False (default): |
| mail . db . idle_limit | Integer | How long the index file (*.msf) for a folder will be kept open, after opening the mail folder. Defaults to 3000 seconds starting with version 15.0. [7] |
| mail . db . max_open | Integer | How many index files (*.msf) should be kept open (after opening the mail folder). Defaults to 30 starting with version 15.0. LRU index files will be closed first. Doesn't effect "special" folders (not clear which ones they are). [8] |
| mail . db_timestamp_leeway | Integer | How much variation in timestamps for *.msf files due to daylight savings time etc. should be ignored. Defaults to 4000. See Daylight savings time |
| mail . default_html_action | Integer | What should it do when sending a HTML message to somebody who might not be able to view it. See Plain text 0: Ask 1: Send as plain text 2 (default): Send as HTML anyways 3: Include both plain text and HTML message bodies in message |
| mail . default_sendlater_uri | String | Defines the Unsent Message folder used by the Send Later button. Defaults to mailbox://nobody@Local%20Folders/Unsent%20Messages |
| mail . delete_matches_sort_order | Boolean | True: If you set View -> Sort by -> Descending when you delete a message it will move the selection up to the next most recent message (rather than to the next oldest message). False(default): Does nothing. [9] |
| mail . display_glyph | Boolean | True(default):Replaces several text characters (such as a smiley) with a graphics image. [10] False: Does nothing. |
| mail . display_struct | Boolean | True(default): Interpret several plain text tags as if they were HTML tags to create bold, underlined, italic text etc. [11] False: Does nothing. |
| mail . enable_autocomplete | Boolean | True(default): Adds the domain from your email address to the recipients email address if it doesn't have a domain. Mainly used to send mail within a company without having to manually add the company name to every address. False: Does nothing. |
| mail . enable_automatic_image_resizing | Boolean (Trunk) |
True: Resize image attachments to fit message-window size. False: Display image attachments in original size. |
| mail . encrypt_outgoing_mail | Boolean | |
| mail . fcc_folder | Boolean | |
| mail . file_attach_binary | Boolean | True: Force base64 encoding of all attachments. False: Only use base64 encoding for binary attachments. |
| mail . fixed_width_messages | Boolean | True: Uses fixed-width fonts in messages. False: Uses variable-width fonts in messages. |
| mail . forward_add_extension | Boolean (Trunk) |
Add an extension when forwarding a message as attachment. True: Create attachment name from Subject and add ".eml" extension. False: Create attachment name from Subject only. |
| mail . forward_message_mode | Integer | 0: Forward an e-mail as attachment by default. 2: Forward an e-mail inline by default. |
| mail . html_compose | Boolean | True: Compose messages in HTML by default. False: Compose messages in plain text by default. |
| mail . identity . default . autocompleteToMyDomain | Boolean | True: Adds your domain name when you start typing an email address in the message composition window. [12] False (default): Does nothing. |
| mail . identity . default . auto_quote | Boolean | |
| mail . identity . default . bcc_list | Boolean | |
| mail . identity . default . bcc_others | Boolean | |
| mail . identity . default . bcc_self | Boolean | |
| mail . identity . default . compose_html | Boolean | |
| mail . identity . default . directoryServer | Boolean | |
| mail . identity . default . draft_folder | Boolean | |
| mail . identity . default . fcc_folder | Boolean | |
| mail . identity . default . fcc_reply_follows_parent | Boolean | |
| mail . identity . default . fcc | Boolean | |
| mail . identity . default . headers | Boolean | |
| mail . identity . default . overrideGlobal_Pref | Boolean | |
| mail . identity . default . reply_on_top | Boolean | |
| mail . identity . default . sig_bottom | Boolean | |
| mail . identity . default . stationery_folder | Boolean | |
| mail . identity . default . valid | Boolean | |
| mail . identity . id# . attach_signature | Boolean | |
| mail . identity . id# . attach_vcard | Boolean | |
| mail . identity . id# . compose_html | Boolean | |
| mail . identity . id# . doBcc | Boolean | |
| mail . identity . id# . doBccList | Boolean | |
| mail . identity . id# . draft_folder | String | |
| mail . identity . id# . drafts_folder_picker | String | |
| mail . identity . id# . encryption_cert_name | String | |
| mail . identity . id# . encryption_policy | Integer | |
| mail . identity . id# . escapedVCard | String | |
| mail . identity . id# . fcc | Boolean | |
| mail . identity . id# . fcc_folder | String | |
| mail . identity . id# . fcc_folder_picker_mode | String | |
| mail . identity . id# . fullName | String | |
| mail . identity . id# . organization | String | |
| mail . identity . id# . reply_to | String | |
| mail . identity . id# . sign_mail | Boolean | |
| mail . identity . id# . signing_cert_name | String | |
| mail . identity . id# . smtpServer | String | |
| mail . identity . id# . stationary_folder | String | |
| mail . identity . id# . tmpl_folder_picker_mode | String | |
| mail . identity . id# . use_custom_prefs | Boolean | |
| mail . identity . id# . usermail | String | |
| mail . identity . idN . valid | Boolean | |
| mail . imap . auto_unsubscribe_from_noselect_folders | Boolean | True (default): Automatically unsubscribe any folders marked \Noselect if they have no subscribed children. False: Does nothing. |
| mail . imap . check_deleted_before_expunge | Boolean | True: Searches a folder for deleted messages. If there are none the expunge is skipped False (default): Doesn't try to optimize. |
| mail . imap . chunk_add | Integer | Number of bytes to adjust chunk size by when dynamically adjusting the chunk size. Defaults to 2048 bytes. |
| mail . imap . chunk_fast | Integer | If a chunk is fetched faster than this, it will increase the chunk size to improve throughput. Defaults to 2 seconds. |
| mail . imap . chunk_ideal | Integer | Ideal amount of time it should take to fetch a chunk. Defaults to 4 seconds. |
| mail . imap . chunk_size | Integer | Initial chunk size to use when fetching IMAP messages in chunks. Defaults to 10240 bytes. |
| mail . imap . cleanup_inbox_on_exit | Boolean | Supported |
| mail . imap . confirm_emptyTrashFolderDeletion | Boolean | True: Asks for confirmation when emptying trash folder for a IMAP account. False (default): Don't ask. |
| mail . imap . delegateOtherUsersFolders | Boolean | Supported |
| mail . imap . expunge_after_delete | Boolean | True: Physically delete the original (deleted) message after its moved to the trash folder. False (default): Do nothing. |
| mail . imap . expunge_option | Integer | Provides auto-expunge like original Eudora. Currently part of Penelope extension. 0 (default): Never occurs. 1: Always occurs 2 : Physically delete the deleted messages when there are at least mail . imap . expunge_threshold_number messages waiting to be expunged. |
| mail . imap . expunge_threshold_number | Integer | Currently part of Penelope extension. Used in mail . imap . expunge_option to specify how many messages need to be deleted before expunging them. Defaults to 20. |
| mail . imap . fetch_by_chunks | Boolean | True (default): Fetch the message in chunks. False: Fetch the entire message. |
| mail . imap . hide_other_users | Boolean | True (default): Don't list other user's namespaces in the subscribe window False: List other users' namespaces in the subscribe window. |
| mail . imap . hide_unused_namespaces | Boolean | True (default): Only display namespaces that contain subscribed child folders in the fodler pane and subscribe window False: Display all namespaces. |
| mail . imap . max_cached_connections | Integer | Maximum number of IMAP connections kept open. Defaults to 10. |
| mail . imap . max_chunk_size | Integer | Maximum chunk size to use when fetching IMAP messages in chunks. Defaults to 10240 bytes. |
| mail . imap . mime_parts_on_demand | Boolean | True (default): Fetch the minimum portion of the message needed. False: Fetch the entire message, including attachments regardless of whether they're needed. |
| mail . imap . mime_parts_on_demand_max_depth | Integer | Controls how complicated the message structure (how many levels of nested attachments for example) has to be before it reverts to fetching the while message. Defaults to 15. |
| mail . imap . mime_parts_on_demand_threshold | Integer | Always fetch the complete contents of a IMAP message unless its size is greater than this value (not worth optimizing whats fetched). Defaults to 30000 bytes. |
| mail . imap . min_chunk_size_threshold | Integer | Don't fetch the message in chunks unless its at least this size. Defaults to 15360 bytes. |
| mail . imap . new_mail_get_headers | Boolean | True (default): Download headers for new mail False: Just notify user of new mail |
| mail . imap . server_sub_directory | Boolean | Supported. |
| mail . imap . use_literal_plus | Boolean | True (default): Allows e-mail client to save a round trip each time a non-synchronizing literal is sent. (if server supports it) False: Wait for response before sending a non-synchronizing literal. |
| mail . imap . use_status_for_biff | Boolean | True: SELECT each folder to update the message summaries, rather than use the STATUS command. False (default): Use the STATUS command to update the message summaries. |
| mail . incorporate . return_receipt | Integer | Sets the destination of incoming mail receipt messages. 0: Inbox folder 1 (default): Sent folder. |
| mail . inline_attachments | Boolean | True: Show inlinable attachments (text, images, messages) after the message. False: Do not display any attachments with the message |
| mail . emptyJunk . dontAskAgain | Boolean | True: Ask for confirmation before deleting messages in junk folder. False (default): Don't ask for confirmation. |
| mail . label_ascii_only_mail_as_us_ascii | Boolean | True: If all of the characters in the message are 7bit, use US-ASCII as the character set. False (default): Don't change the character set. |
| mail . leave_on_server | Boolean | Is this global or obsolete? We normally use mail.server.serverN.leave_on_server |
| mail . mdn . report . enabled | Boolean | See [Figuring out whether the recipient read your message]] True (default): Enables sending a return receipt when requested. Other mdn settings such as mail . mdn . report . other provide finer grained control, such as the ability to make it asking for permission each time. False: Disable sendinga return receipt. |
| mail . mdn . report . not_in_to_cc | Integer | when the recipient is not in the To: or CC: headers: 0 (default): Never respond to a return receipt request 1: Always respond 2: Ask the user whether to respond. |
| mail . mdn . report . other | Integer | What to do if its not covered by not_in_to_cc or .outside_domain 0: Never respond 1: Always respond 2 (default): Ask the user whether to respond. <3> Deny the request. |
| mail . mdn . report . outside_domain | Integer | If the person requesting the return receipt is not in the same domain 0 (default): Never respond 1: Always respond 2: Ask the user whether to respond. |
| mail . migration . copyMailFiles | Boolean | True (default): Copy the local folders directory when importing. Currently ignored. [13] False: Don't let the import wizard copy the local folders directory. |
| mail . movemail_program | String | Specifies the external program to use for movemail if mail . use_movemail is true and mail . use_builtin_movemail is false . However, its always been ignored . [14] |
| mail . movemail_warn | Boolean | True: Enables a warning the first time movemail is used, that their mail is to be copied from the mail spool to the mail directory False (default): Don't warn them. |
| mail . password_protect_local_cache | Boolean | See Protecting the contents of the profile - mail True (default): Prompt for password to access IMAP account and Local Folders. False: Does nothing. |
| mail . phishing . detection . enabled | Boolean | True (default): Warn if Thunderbird thinks its a scam. This is normally based on a mismatch between the visible link and the underlying URL. False: Don't warn. |
| mail . phishing . detection . ipaddresses | Boolean | True (default): Also check URLs that are ip addresses. False: Only check http and https URLs. |
| mail . phishing . detection . mismatched_hosts | Boolean | True (default): Check host name matches link text False: Don't check. |
| mail . pop3 . deleteFromServerOnMove | Boolean | True: Delete the copy of the message on the POP3 server if you move or delete the message. False(default): Only delete the copy of the message on the POP3 server if you delete the message. [15] |
| mail . pop3_gets_new_mail | Boolean | True: Downloads new mail False: Merely notifies user of new mail |
| mail.preferences . advanced . selectedTabIndex | Integer | Defaults to zero. |
| mail.preferences . compose . selectedTabIndex | Integer | Defaults to zero |
| mail.preferences . display . selectedTabIndex | Integer | Defaults to one |
| mail.preferences . privacy . selectedTabIndex | Integer | Defaults to three. |
| mail . prompt_purge_threshhold | Boolean | True (default): Enables automatic compacting when a certain amount of space is wasted. False: Doesn't enable automatic compacting. |
| mail . purge . ask | Boolean | Whether to prompt before automatic compacting. Defaults to true in recent builds. See Customizing compacting for details. |
| mail . purge . min_delay | Integer | Minimum delay before the junk mail controls purge a junk folder. Defaults to 480 minutes. [16] |
| mail . purge_threshhold | Integer | How much space (in KB) has to be wasted for a folder to be automatically compacted, if mail . prompt_purge_threshhold is True. It is ignored starting with Thunderbird 5.0 and SeaMonkey 2.2, and mail . purge_threshhold_MB used instead. |
| mail . purge_threshhold_mb | Integer | How much space (in MB) has to be wasted for a folder to be automatically compacted, if mail . prompt_purge_threshhold is True. Exists only in Thunderbird 5.0, SeaMonkey 2.2, and later versions; default is 20 MB. |
| mail . purge . timer_interval | Integer | How often the junk mail controls check whether to purge the junk folder. Defaults to 5. [17] |
| mail . quota . mainwindow_threshold . critical | Integer | %-quota used when quota gauge turns red |
| mail . quota . mainwindow_threshold . show | Integer | %-quota used when quota gauge appears (IMAP only) |
| mail . quota . mainwindow_threshold . warning | Integer | %-quota used when quota gauge turns orange |
| mail . quoteasblock | Boolean | |
| mail . quoted_graphical | Boolean | |
| mail . quoted_size | Integer | Font size of the original message text in replies and forwards. 0: current default text size 1:one point larger than the default size 2:one point smaller than the default size |
| mail . quoted_style | Integer | Text attributes of the original message text in replies and forwards. 0: plain text 1: bold 2: italics 3: bold and italic |
| mail . receipt . request_header_type | Boolean | |
| mail . receipt . request_return_receipt_on | Boolean | |
| mail . request . return_receipt | Boolean | True: Request return receipt on all outgoing messages False: Do nothing |
| mail . sash_geometry | Boolean | |
| mail . send_struct | Boolean | True: Interpret several plain text tags as if they were HTML tags to create bold, underlined, italic text etc in the message that will be sent. False(default): Does nothing. |
| mail . server . default . abbreviate | Boolean | |
| mail . server . default . allows_specialfolders_usage | Boolean | |
| mail . server . default . always_authenticate | Boolean | |
| mail . server . default . auth_login | Boolean | |
| mail . server . default . autosync_offline_stores | Boolean | |
| mail . server . default . canCreateFolders | Boolean | |
| mail . server . default . canDelete | Boolean | |
| mail . server . default . canFileMessages | Boolean | |
| mail . server . default . check_time | Boolean | |
| mail . server . default . deferred_to_account | Boolean | |
| mail . server . default . delete_by_age_from_server | Boolean | |
| mail . server . default . delete_mail_left_on_server | Boolean | |
| mail . server . default . delete_model | Boolean | IMAP specific. 0:markDeleted 1: moveToTrashFolder 2:deleteImmediately (unclear if these are accurate, based on a reading of the source - the code for 0 & 2 seems to do the same thing) [code apropos imap.deleteModel] |
| mail . server . default . dot_fix | Boolean | |
| mail . server . default . download_on_biff | Boolean | |
| mail . server . default . dual_use_folders | Boolean | |
| mail . server . default . dup_action | Boolean | |
| mail . server . default . empty_trash_on_exit | Boolean | |
| mail . server . default . fetch_by_chunks | Boolean | |
| mail . server . default . isSecure | Boolean | |
| mail . server . default . leave_on_server | Boolean | |
| mail . server . default . limit_offline_message_size | Boolean | |
| mail . server . default . login_at_startup | Boolean | |
| mail . server . default . logon_fallback | Boolean | |
| mail . server . default . mark_old_read | Boolean | |
| mail . server . default . max_articles | Boolean | |
| mail . server . default . max_articles | Boolean | |
| mail . server . default . mime_parts_on_demand | Boolean | |
| mail . server . default . moveOnSpam | Boolean | |
| mail . server . default . moveTargetMode | Boolean | |
| mail . server . default . notify . on | Boolean | |
| mail . server . default . num_days_to_leave_on_server | Boolean | |
| mail . server . default . offline_support_level | Boolean | |
| mail . server . default . override_namespaces | Boolean | |
| mail . server . default . port | Boolean | |
| mail . server . default . purgeSpam | Boolean | |
| mail . server . default . purgeSpamInterval | Boolean | |
| mail . server . default . retainBy | Boolean | |
| mail . server . default . serverFilterName | Boolean | |
| mail . server . default . serverFilterTrustFlags | Boolean | |
| mail . server . default . singleSignon | Boolean | |
| mail . server . default . socketType | Boolean | |
| mail . server . default . spamActionTargetAccount | Boolean | |
| mail . server . default . spamActionTargetFolder | Boolean | |
| mail . server . default . spamLevel | Boolean | |
| mail . server . default . store_read_mail_in_pfc | Boolean | |
| mail . server . default . store_sent_mail_in_pfc | Boolean | |
| mail . server . default . use_condstore | Boolean | IMAP specific. True (default): Use conditional store to detect and resolve conflicts between multiple writing mail clients while synchronizing messages. False: Disables that mechanism. Gmail IMAP accounts typically use this mechanism. If it does not work correctly Thunderbird figures out there are new messages in your IMAP folders but does not download them. https://bugzilla.mozilla.org/show_bug.cgi?id=885220#c82 |
| mail . server . default . use_idle | Boolean | |
| mail . server . default . useSecAuth | Boolean | |
| mail . server . default . useServerFilter | Boolean | |
| mail . server . default . useWhiteList | Boolean | |
| mail . server . default . using_subscription | Boolean | |
| mail . server . default . valid | Boolean | |
| mail . server . default . whiteListAbURI | Boolean | |
| mail . server . server#. ageLimit | Integer | |
| mail . server . server# . autosync_offline_stores | Boolean | IMAP specific. See Offline folders True: Download a message for offline use whenever the folder is opened or Thunderbird detects new mail in that folder. This is an alternative to the traditional offline folder mechanism. False (default): Doesn't implement AutoSync. |
| mail . server. server# . capability | Integer | IMAP specific. Its a bit mask of the capabilities reported by the IMAP server. See line 113 of this header file for an explanation of each bits setting. For example, 786977= 0xC0221 means it supports IDLE, QUOTA, NAMESPACE, IMAP4rev1 and the CAPABILITY command. This is a much easier way to get the information than asking somebody to enable IMAP logging and look in the log file to see what the CAPABILITY command returned. |
| mail . server . server# . check_new_mail | Boolean | Setting it true enables checking for new mail every mail . server . server# . check_time minutes, and checks the checkbox next to "Check for new messages every X minutes". |
| mail . server . server# . check_time | Integer | How often it should check for new mail for that account. Its set by Tools -> Account Settings -> Server Settings -> Check for new messages every X minutes. |
| mail . server . server# . cleanup_inbox_on_exit | Boolean | IMAP specific |
| mail . server . server# .daysToKeepBodies | Integer | |
| mail . server . server# . daysToKeepHdrs | Integer | |
| mail . server . server# . defer_get_new_mail | Boolean | Used by webmail extension. |
| mail . server . server# . delete_mail_left_on_server | Boolean | Used by webmail extension. |
| mail . server . server# . delete_model | Integer | see mail . server . default . delete_model |
| mail . server . server# .directory | String | |
| mail . server . server# . directory-rel | String | |
| mail . server . server# . download_on_biff | Boolean | POP3 specific |
| mail . server . server# . exit_trash_on_exit | Boolean | IMAP specific |
| mail . server . server# . hostname | String | Name of the mail server. For example, pop.gmail.com |
| mail . server . server# . leave_on_server | Boolean | POP3 specific |
| mail . server . server# . login_at_startup | ||
| mail . server . server# . moveOnSpam | ||
| mail . server . server# . name | String | The account name. For example, Gmail. |
| mail . server . server# . numHdrsTokeep | Integer | |
| mail . server . server# . port | ||
| mail . server . server# . realhostname | String | Used by webmail extension. |
| mail . server . server# .realusername | String | Used by webmail extension. |
| mail . server . server# . remember_password | String | |
| mail . server . server# . socketType | ||
| mail . server . server# .spamActionTargetAccount | String | |
| mail . server . server# .spamActionTargetFolder | String | |
| mail . server . server# . spamLevel | Integer | |
| mail . server . server# . TargetMode | ||
| mail . server . server# . type | String | imap for IMAP accounts, pop3 for POP accounts. The webmail extension uses "pop3" when it emulates a POP3 account. The local folder account has a empty string. |
| mail . server . server# . username | String | User login name for that account. |
| mail . show_headers | Integer | 1 (default): |
| mail . showCondensedAddresses | Boolean | True (default): Show just the display name for people in the address book False: Show both the email address and display name. |
| mail . showFolderPaneColumns | Boolean | True: Show expanded columns in the folder pane False (default): Just show the normal columns. |
| mail . showPreviewText | Boolean | True (default): False: |
| mail . signature_file | String | Pathname for a file containing ASCII text that is automatically appended to messages and newsgroup posts. See Signatures - Thunderbird. |
| mail. smtp. defaultserver | String | Default SMTP server. |
| mail . smtp . ssl | Integer | 0 (default): Don't use SSL 1: Try to use SSL 2: Must use SSL |
| mail . smtp . useMatchingDomainServer | Boolean | True: Use password from POP/IMAP server with matching username and domain False (default):Does nothing. |
| mail . smtp . useMatchingHostNameServer | Boolean | True: Use password from POP/IMAP server with matching username and host name False (default):Does nothing. |
| mail . smtpserver . default . auth_method | Boolean | |
| mail . smtpserver . default . hello_argument | String | Lets you replace your IP address with the specified string in Received: headers when your IP address is not a "fully qualified domain name" (FQDN). Typically you only need to do this when you have a NAT box to prevent it from using the NAT boxes IP address. If you don't set it to something in your SMTP server's domain it may increase your spam score. [18] |
| mail . smtpserver . default . trySecAuth | Boolean | |
| mail . smtpserver . default . try_ssl | Boolean | |
| mail . smtpserver . smtpN. hello_argument | String | Lets you replace your IP address with the specified string in Received: headers when your IP address is not a "fully qualified domain name" (FQDN) when sending using SMTP server N. Typically you only need to do this when you have a NAT box to prevent it from using the NAT boxes IP address. If you don't set it to something in your SMTP server's domain it may increase your spam score. [19] |
| mail.smtpservers | String | Comma separated list of existing SMTP servers. If its not listed here the SMTP server ignored. |
| mail . smtpserver . smtp# . auth_method | Integer | Authentication method used by SMTP server N |
| mail . smtpserver . smtp# . description | String | |
| mail . smtpserver . smtp# . hostname | String | |
| mail . smtpserver . smtp# . port | Integer | |
| mail . smtpserver . smtp# . try_ssl | Integer | |
| mail . smtpserver . username | Integer | |
| mail . spam . display . sanitize | Boolean | True (default): Sanitize the HTML in spam messages. False: Does nothing. |
| mail . spam . logging . enabled | Boolean | |
| mail . spam . manualMark | Boolean | |
| mail . spam . manualMarkMode | Boolean | |
| mail . spam . markAsReadOnSpam | Boolean | |
| mail . spam . version | Boolean | |
| mail . spellcheck . inline | Boolean | True (default): Enables spell checking as you type False: Does nothing. |
| mail . SpellCheckBeforeSend | Boolean | True: Spell checks the message before sending. False(default): Does nothing. |
| mail . spotlight . enable | Boolean | OSX specific setting for the optional Spotlight Integration component[20] True: Create a .mozxeml file for each message in a folder. Spotlight needs this to index Thunderbird messages. False (default): Doesn't create the additional files that Spotlight needs. |
| mail . standalone | Boolean | |
| mail . startup . enabledMailCheckOnce | Boolean | |
| mail . store_conversion_enabled | Boolean | True: Enables conversion of mbox files to maildir files in version 60 or later. False (default): Can not convert storage formats. [21] |
| mail . strictly_mime | Boolean | True: Always MIME encode 8-bit headers False: Only MIME encodes them when necessary. |
| mail . strictly_mime_headers | Boolean | |
| mail . strictly_mime . parm_folding | Boolean | |
| mail . strict_threading | Boolean | |
| mail . tabs . autohide | Boolean | False (default): Hides the tab bar if there is only one tab. |
| mail . tabs . closeButtons | Integer | Undefined (default in SeaMonkey): use browser . tabs . closeButtons 0: Tab close button (X) on current tab only (except first) |
| mail . tabs . closeWindowWithLastTab | Boolean | Controls whether closing the last tab closes the wsindow. Undefined (default in SeaMonkey): use browser . tabs . closeWindowWithLastTab |
| mail . tabs . drawInTitlebar | Boolean | True (default): Tabs are drawn in the title bar. False: Use old behavior (tabs not in title bar). [22] |
| mail . tabs . tabClipWidth | Integer | Undefined (default in SeaMonkey): use browser . tabs . tabClipWidth (number): Override browser . tabs . tabClipWidth. |
| mail . tabs . tabMaxWidth | Integer | Maximum width of a mailer tab in pixels Undefined (default in SeaMonkey): use browser . tabs . tabMaxWidth. |
| mail . tabs . tabMinWidth | Integer | Minimum width of a mailer tab in pixels Undefined (default in SeaMonkery): use browser . tabs . tabMinWidth. |
| mail . thread_without_re | Boolean | True: Groups messages with same subject without a leading Re: in the same thread. False: Doesn't group them. |
| mail . toolbars . showbutton . file | Boolean | True (default): Display File button in toolbar. False: Don't display it. However, you can still add it by customizing the toolbar. |
| mail . toolbars . showbutton . junk | Boolean | True (default): Display junk/not-junk button in toolbar. False: Don't display it. However, you can still add it by customizing the toolbar. |
| mail . toolbars . showbutton . next | Boolean | True (default): Display the Next button in toolbar. False: Don't display it. However, you can still add it by customizing the toolbar. |
| mail . toolbars . showbutton . print | Boolean | True (default): Display the Print button in toolbar. False: Don't display it. However, you can still add it by customizing the toolbar. |
| mail . toolbars . showbutton . stop | Boolean | True (default): Display the Stop button in toolbar. False: Don't display it. However, you can still add it by customizing the toolbar. |
| mail . trusteddomains | String | List of comma separated domains that it should automatically display remote images for. See Privacy basics |
| mail . ui . display . dateformat . default | Integer | See Date display format |
| mail . ui . display . dateformat . thisweek | Integer | See Date display format |
| mail . ui . display . dateformat . today | Integer | See Date display format |
| mail . ui . folderpane . version | Boolean | |
| mail . ui . folderpane . view | Boolean | |
| mail . use_builtin_movemail | Boolean | True: Enables a warning the first time movemail is used that their mail is about to be transfered to from the mail spool to the mail directory False (default): Disables the warning . |
| mail . warn_on_send_accel_key | Boolean | |
| mail . wrap_long_lines | Boolean | |
| mail . winsearch.enable | Boolean | True: Enables integration with Windows Search, and creates *.wdseml files in .mozmsgs subdirectories. False (default): Disables Windows Search integration. |
| mail . signature_date | Boolean |
Mailnews.
| Name | Type | Meaning of values |
|---|---|---|
| mailnews . account_central_page . url | String | URL that specifies the contents of the account central pane. It defaults to chrome://messenger/content/msgAccountCentral.xul . That pane is displayed whenever you click on the name of a account in the folder pane. Its not limited to a image file, XUL file or an about page such as about:about , you can use it to display any web page (local or remote). mailnews.start_page.url is similar, but it only effects the Mail Start Page. |
| mailnews . append_preconfig_accounts . version | Integer | A version number that is increased when pre-configured accounts are added. Defaults to 1. |
| mailnews . attachments . display . largeView | Boolean | True (default): Display slightly larger attachments filename/icons False: Display attachments filename/icons normal size. |
| mailnews . auto_unzip_saved_attachments | Boolean | True: False (default) |
| mailnews . autoComplete . commentColumn | Integer | Typically used with ldap_2.servers . DIRECTORYNAME . autoComplete . commentFormat to add a comment field in auto-complete. 0 = none , 1 = name of addressbook this card came from, 2 = LDAP [23] |
| mailnews . chat . enabled | Boolean | True (default): Enables chat. Added in Thunderbird 13.0. [24] [25] False: Tools -> Chat Status menu removed. |
| mailnews . confirm . moveFoldersToTrash | Boolean | |
| mailnews . customDBHeaders | Boolean | |
| mailnews . customHeaders | String | List of custom headers. Except for the last entry each ends with ':' and the list is seperated using spaces. For example: X-Spam-hits: Body: Reply-To |
| mailnews . database . global . indexer . enabled | Boolean | True (default): Enables global search and indexing, storing the data in global-messages-db.sqlite [26] False: Disables global search and indexing. A side effect of that is it also disables Message -> Open in Conversation since that relies upon the messages being indexed. |
| mailnews . database . global . logging . console | Boolean | True: Warning and error messages will be displayed in the error console. False (default): The error console doesn't contain anything from Gloda. |
| mailnews . database . global . logging . dump | Boolean | True: If browser.dom.window.dump.enabled is also true it dumps logging data to stdout. False (default): No output. |
| mailnews . database . global . logging . net | Boolean | True: Supposedly looks for a chainsaw.ptr file that specifies the hostname and port to send XML formatted log records to. [27] False (default): No output. |
| mailnews . default_news_sort_order | Integer | 1(default): |
| mailnews . default_news_sort_type | Integer | 22(default): |
| mailnews . default_sort_order | Integer | 1(default): Default value doesn't match any in [28] |
| mailnews . default_sort_type | Integer | 18(default): |
| mailnews . default_news_view_flags | Integer (trunk) | Bit mask for default view of mail/RSS folders. 0x0: None 0x1 (default): Threaded display 0x8: Show ignored 0x10: Unread only 0x20 Expand all 0x40: Group by sort |
| mailnews . default_view_flags | Integer (trunk) | Bit mask for default view of mail/RSS folders. 0x0 (default): None 0x1: Threaded display 0x8: Show ignored 0x10: Unread only 0x20 Expand all 0x40: Group by sort |
| mailnews . display . disable_format_flowed_support | Boolean | Don't rewrap flowed plain-text messages to window width when displaying. True: Ignore flowed formatting despite format=flowed being set. False (default): Honor flowed formatting if format=flowed is present. |
| mailnews. display. disallow_mime_handlers | Integer | What classes can process incoming data. Its meant for paranoid users. [29] 0 (default): All classes 1: Don't display HTML 2: Don't display HTML and inline images 3: Don't display HTML, inline images and some other uncommon types 100: Use a hard coded list |
| mailnews . display . html_as | Integer | How to display HTML parts of a message body [30] 0 (default): Display the HTML normally 1: Convert it to text and then back again 2: Display the HTML source 3: Sanitize the HTML 4: (in trunk builds later than 2011-07-23) Display all body parts (see bug 602718 and comm-central changeset c1ef44a22eb2) |
| mailnews . display.html_sanitizer . allowed_tags | String | What HTML tags are allowed. If they're not listed View -> Message Body as -> Original HTML strips them [31] html head title body p br div(lang,title) h1 h2 h3 h4 h5 h6 ul ol li(value,start,compact) dl dt dd blockquote(type,cite) pre noscript noframes strong em sub sup span(lang,title) acronym(title) abbr(title) del(title,cite,datetime) ins(title,cite,datetime) q(cite) a(href,name,title) img(alt,title,longdesc) base(href) area(alt) applet(alt) object(alt) var samp dfn address kbd code cite s strike tt b i table(align) caption tr(align,valign) td(rowspan,colspan,align,valign) th(rowspan,colspan,align,valign) |
| mailnews . display . original_date | Boolean | True: Display date in message window in RFC822 style as received. False (default): Display date according to selected format. |
| mailnews . display . prefer_plaintext | Boolean | True: Display a message as plain text when there is both a HTML and a plain text version of a message body [32] False (default): Display a message as HTML when there is both a HTML and a plain text version of a message body. |
| mailnews . fakeaccount . server | Boolean | |
| mailnews . fakeaccount . show | Boolean | |
| mailnews . force_ascii_search | Boolean | True: Only use ASCII characters in search commands sent to IMAP server. False: Specify the locale (what language and region) in the search command if the IMAP server supports it . |
| mailnews . force_charset_override | Boolean | |
| mailnews . global_html_domains . version | Boolean | |
| mailnews . headers . extraExpandedHeaders | String | Default is the empty string. |
| mailnews . headers . minNumHeaders | Integer | Minimum number of headers to display in the header pane to keep the height from changing when headers are present. Defaults to 0. |
| mailnews . headers . showOrganization | Boolean | True: Show Organization header in message pane False:(default) Does nothing. |
| mailnews . headers . showMessageId | Boolean (trunk) | True: Show Message Id header in message pane False:(default) Does nothing. |
| mailnews . headers . show_n_lines_before_more | Integer | Set to "0" for "all", or any number of lines you want to be shown when opening a message before the "more" appears. It defaults to 1. |
| mailnews. headers . showReferences | Boolean | True: Show References header in message pane False:(default) Does nothing. |
| mailnews . headers . showSender | Boolean | True: Show Sender header in message pane. False:(default) Does nothing. |
| mailnews . headers . showUserAgent | Boolean | True: Show User Agent header in message pane False:(default) Does nothing. |
| mailnews . html_domains | String | A list in the address book of domains whose recipients are assumed to have a e-mail client that supports HTML, separated by commas. |
| mailnews . import . text . skipfirstrecord | Boolean | |
| mailnews . labels . color . 1 | String | Defaults to #FF0000 (red) |
| mailnews . labels . color . 2 | String | Defaults to #FF9900 (orange) |
| mailnews . labels . color . 3 | String | Defaults to #009900 (green) |
| mailnews . labels . color . 4 | String | Defaults to #3333FF (blue) |
| mailnews . labels . color . 5 | String | Defaults to #993399 (purple) |
| mailnews . labels . description . 1 | Boolean | |
| mailnews . labels . description . 2 | Boolean | |
| mailnews . labels . description . 3 | Boolean | |
| mailnews . labels . description . 4 | Boolean | |
| mailnews . labels . description . 5 | Boolean | |
| mailnews . language_sensitive_font | Boolean | |
| mailnews . logComposePerformance | Boolean | |
| mailnews . mark_message_read . delay | Boolean | |
| mailnews . mark_message_read . delay . interval | Integer | |
| mailnews . message_display . allow . plugins | Boolean | |
| mailnews . message_display . disable_remote_image | Boolean | |
| mailnews . nav_crosses_folders | Integer | What folders/groups are reachable when the Next button is pressed. 0: Cross folders/groups without asking. 1: Ask for user confirmation. 2: Stick with the current folder/group. |
| mailnews . offline_sync_mail | Boolean | |
| mailnews . offline_sync_news | Boolean | |
| mailnews . offline_sync_send_unsent | Boolean | |
| mailnews . offline_sync_work_offline | Boolean | |
| mailnews . open_window_warning | Boolean | |
| mailnews . plaintext_domains | Boolean | |
| mailnews . quotingPrefs . version | Boolean | |
| mailnews . remember_selected_message | Boolean | True(default): Selects the last message selected in the folder again the next time you open that folder. False: Does nothing. |
| mailnews . reply_header_authorwrote | String | Replaces the %s with the author's name or e-mail address. Default: %s wrote |
| mailnews . reply_header_colon | String | Adds more text here, either before the colon or replacing the colon. Defaults to a ':'. |
| mailnews . reply_header_locale | String | Optionally specify a locale for formatting the date and time—for example: en-US. Defaults to a empty string. |
| mailnews . reply_header_ondate | String | Replaces the %s with the date and time. Default: On %s |
| mailnews . reply_header_originalmessage | String | Reply header to be used when mailnews.reply_header_type is 0 (which is not the default). Default: -------- Original Message -------- |
| mailnews . reply_header_separator | String | Adds more text here, either before the comma or replacing the comma. Defaults to a comma and a space. |
| mailnews . reply_header_type | Integer | How to format the reply heading. 0: Use mailnews.reply_header_originalmessage 1 (default): "author wrote:" 2: "On date time, author wrote:" 3: author wrote, On date time:" |
| mailnews . reply_in_default_charset | Boolean | Character encoding of a reply (may be upgraded to UTF-8). True: Use default character encoding also used for new messages. False (default): Use character encoding of the message replied to. |
| mailnews . reply_on_top | Integer | 1: Reply on top 0 (default): Reply on bottom |
| mailnews . reply_to_self_check_all_ident | Boolean | True: Check all identities when replying to self False(default): Does nothing |
| mailnews . reply_with_extra_lines | Integer | The number of extra lines to add after the quoted text. |
| mailnews . reuse_message_window | Boolean | True: Messages reuse a window. False: A new window is used for each message. |
| mailnews . reuse_thread_window2 | Boolean | True: Message threads reuse a window. False: A new window is used for each message thread. |
| mailnews . scroll_to_new_message | Boolean | True(default): False: |
| mailnews . search_date_format | Integer | Valid format options are: 0(default): auto-detect the current locale format 1: yyyy/mm/dd 2: yyyy/dd/mm 3: mm/dd/yyyy 4: mm/yyyy/dd 5: dd/mm/yyyy 6: dd/yyyy/mm |
| mailnews . search_date_separator | String | Separator for search date (e.g. "/", "-"), or empty when search_date_format is zero |
| mailnews . search_date_leading_zeroes | Boolean | Leading zeros for day and month values, not used if mailnews.search_date_format is not zero |
| mailnews . send_default_charset | Boolean | |
| mailnews . send_plaintext_flowed | Boolean | True (default): Send plain-text messages with flowed attribute, allowing rewrap. False: Send plain-text messages with hard line breaks as entered. |
| mailnews . show_send_progress | Boolean | True (default): Show the progress message box when sending an e-mail. False: Only show the progress bar in the main window. |
| mailnews . start_page . enabled | Boolean | True (default): Enables the start page (which loads at the bottom) False: Disables the start page |
| mailnews . start_page . url | String | Loads that URL instead of the default start page. See Start Page for mail. |
| mailnews . tcptimeout | Integer | Connection timeout. Defaults to 120 seconds. Not clear if it still has a upper limit of 240 seconds. |
| mailnews . thread_pane_column_unthreads | Boolean | True: Click on any column header other than the thread column unthreads the view. False (default): Click on any column header other than the tread columns does not change threading, only changes sort order. |
| mailnews . threadpane_select_delay | Integer | 250 (default): To improve scrolling performance, prevents immediate display of message when scrolling through threadpane. |
| mailnews . timeline_is_enabled | Boolean | Only use this in performance measurement-timeline builds True: Enables performance measurements False (default): Does nothing. |
| mailnews . ui . addressbook_panel_results . version | Boolean | |
| mailnews . ui . addressbook_results . version | Boolean | |
| mailnews . ui . advanced_directory_search_results . version | Boolean | |
| mailnews . ui . deleteMarksRead | Boolean | True (default): If the user deletes a message before its mark as read timer goes off, the message is marked as read (this ensures that the biff indicator from the system tray is cleared when the new message is deleted). Only works in SeaMonkey 2.1b1 and above. Has no effect in Thunderbird. See Bug 465116 |
| mailnews . ui . junk . firstuse | Boolean | True (default): Display information about the ant-spam features the first time the junk mail controls are used. false: Does nothing. |
| mailnews . ui . junk . manualMarkAsJunkMarksRead | Boolean | True (default): When the user explicitly marks a message as junk, it is also marked as read. This is independent of the "markAsReadOnSpam" pref, which applies only to messages automatically classified by the bayesian filter. |
| mailnews . ui . select_addresses_results . version | Boolean | |
| mailnews . ui . threadpane . version | Boolean | |
| mailnews . use_received_date | Boolean | |
| mailnews . view_default_charset | Boolean | |
| mailnews . wraplength | Integer | Wrap a line at this character, when composing plain text messages. |
News.
| Name | Type | Meaning of values |
|---|---|---|
| news . cache_xover | Boolean | Unused. Defaults to false. |
| news . cancel . alert_on_success | Boolean | |
| news . cancel . confirm | Boolean | |
| news . cc_self | Boolean | True: Carbon copy the sender on any outgoing discussion messages, independent of news . default_cc False: Doesn't copy it. |
| news . default_cc | Boolean | True: Automatically copy the sender on any outgoing discussion messages using this email address. False: Doesn't copy it. |
| news . default_fcc | Boolean | OSX uses news . use_fcc. instead. True: Automatically copy outgoing discussion messages to this folder. False: Doesn't copy it. |
| news . fcc_folder | Boolean | |
| news . get_messages_on_select | Boolean | |
| news . mark_old_read | Boolean | |
| news . max_articles | Boolean | |
| news . notify . on | Boolean | |
| news . persist_server_open_state_in_folderpane | Boolean | |
| news . sash_geometry | Boolean | |
| news . show_first_unread | Boolean | |
| news . show_size_in_lines | Boolean | |
| news . update_unread_on_expand | Boolean | |
| news . use_fcc | Boolean | OSX specific. Other platforms enable this feature using news . default_fcc True: Automatically copy any outgoing discussion messages to the folder specified by news . default_fcc . False: Doesn't copy it. |
| news . wrap_long_lines | Boolean |
Misc mail settings
| Name | Type | Meaning of values |
|---|---|---|
| clipboard . paste_image_type | Integer (Trunk) |
Determines the order of formats in which images are pasted from the clipboard: 0: Prefer JPEG over PNG over GIF (minimize size) 1: Prefer PNG over JPEG over GIF (default, best quality) 2: Prefer GIF over JPEG over PNG (compatibility, GIF not supported by all platforms) |
| converter . html2txt . structs | Boolean | True: Replaces bold with *asterisks*, italics with /slashes/, and underlining with _underscore_ characters when both viewing and sending messages. Exact effects are unclear. [33] False(default): Does nothing. |
| editor . singleLine . pasteNewlines | Integer | A value of 4 substitutes commas for new lines in single line text boxes. There don't appear to be any other values defined. |
| extensions . strictCompatibility | Boolean | True (default): Disables legacy add-ons that were not explicitly marked as compatible with Thunderbird 60 by changing maxVersion in the install.rdf file in the add-on to version 60 or greater. [34] The goal was to disable by default any add-ons that probably won't work with version 60 (due to not being actively maintained) without making it unnecessarily difficult for the author to add support for version 60. Add-ons Guide 57-60 describes the modifications that might be necessary due to the changed interfaces.
False: If an add-on is unaffected by the changes in Add-ons Guide 57-60 it might work "as is". |
| hotmail . selectedTabIndex | ||
| javascript . allow . mailnews | Boolean | True: Interpret javascript within the email client (has no effect on the browser) False: Don't interpret javascript. |
| layers . accelerate-all | Boolean | True (default): Enable Direct3D hardware accelerated compositing of layers. False: Disable the compositing support. You might need to do this if you get a black profile manager window. [35] |
| layers . accelerate-none | Boolean | |
| ldap_2 . servers . DIRECTORYNAME . autoComplete . commentFormat | String | If mail . autoComplete . commentColumn is 2 it specifies what LDAP attribute should be displayed in auto-complete. [36] |
| mapi . blind-send . enabled | Boolean | True:(default) Warn the user the first time about the blind send False: Do nothing |
| mousewheel . withnokey . action | Boolean | Lightning |
| mousewheel . withshiftkey . action | Boolean | Lightning |
| msgcompose . background_color | String | |
| msgcompose . font_face | String | |
| msgcompose . font_size | String | |
| msgcompose . text_color | String | |
| network . cookie . same-site . enabled | Boolean | True (default): Enables same site cookies (used to disable third-party usage for a specific cookie)[37]. :False: Do this to make CalDAV access to some servers work. |
| offline . autoDetect | Boolean | |
| offline . download . download_messages | Integer | 0 (default): Ask before synchronizing offline folders when going offline 1: Always synchronize the offline folders when going offline 2: Never synchronize the offline folders when going offline. |
| offline . news . download . by_date | Boolean | True (default): False: |
| offline . news . download . days | Integer | Defaults to 30. |
| offline . news . download . increments | Integer | 0: Yesterday 1: One week ago 2: Two weeks ago 3(default): One month 4: Six months 5: One year. |
| offline . news . download . unread_only | Boolean | True(default): False: |
| offline . send . unsent_messages | Integer | 0: Ask before sending unsent messages when going online 1: Always send unsent messages when going online 2 (default): Never send unsent messages when going online |
| offline . startup_state | Integer | 0 (default): Use network.online to set online status at startup 1: Prompt user. 3: Offline. 4: Automatic. [38] |
| toolkit . telemetry . enabled | Boolean | True: Gather and report anonymous performance information (mainly for Gloda). False (default): Does nothing. [39] |
| permissions.default.image | Integer | 1 (default): Allow all images to load, regardless of origin. This also enables the "Show Remote Content" button. 2: Block all images from loading. 3: Prevent third-party images from loading. |
| yahoo . selectedTabIndex |
