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Configuration

TBC

Config Editor settings

The Config Editor is accessed via Preferences -> Advanced -> Config Editor.

  • mail.imap.auto_unsubscribe_from_noselect_folders  Default and desired value: true
  • mail.server.default.check_all_folders_for_new  Default false.  Setting it true avoids the user having to wait for mails to be downloaded on opening folders other than the Inbox – but it may degrade overall performance, especially when Thunderbird is started.  When the IMAP server is local it should be OK.  In case of several IMAP servers, the setting can be made for specific servers using mail.server.server<n>.check_all_folders_for_new

 

Usage

Backup considerations

Thunderbird will rebuild .MSF files as needed if they are missing so no need to back them up.

If backups are incremental, big folders (documented below) can result in huge backup data volumes.

Folder maintenance

Big folders

Thunderbird uses a single file for some folders: Drafts, Inbox, Sent and Trash.  When they grow large, say > 250 MB, it is prudent to reduce their size:

From kb.mozillazine (http://kb.mozillazine.org/Compacting_folders): If the folder is severely corrupted, deleting the .msf file won't help much, and compacting the folder may just make things worse because Thunderbird can't reliably figure out where a message ends anymore. You'll typically run into this only with the Inbox folder. It's much more vulnerable to corruption because it frequently has both lots of messages and a high percentage of deleted (but not visible) messages. That's why it's recommended that you move messages you want to keep to other folders/child folders rather than keep storing them in the Inbox."

Troubleshooting

TBC

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