Message aging
From MozillaZine Knowledge Base
Look for message ageing (with permanent deletion) in Thunderbird 1.1. Currently settings are available at:
- "Tools -> Account Settings -> [account name]" and then "Disk Space" (for Local Folders and POP accounts) or "Offline & Disk Space" (for IMAP accounts).
- "Edit -> Folder Properties... -> Retention Policy" (for folder-specific settings).
More info:
- bug 11055
- available from 2005-06-02 Trunk builds