Password not remembered - Thunderbird
From MozillaZine Knowledge Base
Server is down
If a server is down, Thunderbird will forget your password and will keep asking you to re-enter it till it connects to the server or until you Cancel, whichever comes first.
No checkbox to remember passwords
It can happen that you will find no checkbox in Thunderbird to remember passwords. To change this, you will need to edit the prefs.js file, located in the Thunderbird profile folder.
- Close Thunderbird and open the prefs.js file in Notepad or another editor (make a backup copy of prefs.js first, as a precaution).
- Find the following line: user_pref("signon.rememberSignons", false);
- Change the value from false to true.
- Close the Notepad or editor window and save changes.
- On the next startup of Thunderbird you should find the checkbox for remembering the password in the password manager.
Instead of editing prefs.js, you can change the same setting via about:config.