IMAP synchronization question

Jonathan Protzenko jonathan.protzenko at
Sat Aug 17 09:43:34 UTC 2013


I've encountered a weird behavior that I managed to tame some years ago 
using a combination of hidden prefs, but that I can't seem to fix now. 
The problem could be summed up as "Thunderbird figures out there are 
new messages in my IMAP folders but does not download them".

In more detail:
- the folder pane tells me there are 10 new mails in my "tb-planning" 
- I click on the said folder, and then the 10 mails do _not_ appear,
- Thunderbird works for quite some time (connecting to server, opening 
folder tb-planning, downloading new messages...),
- finally, the messages arrive.
The frustrating thing is that if I go offline, and ask Thunderbird to 
download messages, it will aggressively fetch messages from other 

Am I missing something or is it just the expected behavior?



PS: this is a Gmail account, so it may be a case of "Gmail does not 
support imap extension X"
PPS: I just checked: I'm subscribed to all folders, the faulty folder 
is selected for offline use, and I do have the hidden pref 
mail.server.default.check_all_folders_for_new set to true!

More information about the tb-planning mailing list