Maybe once the messages are in the local database, they are no longer refetched from server even with the logic of TB16. The bug was that under some circumstances (size differences) TB16 refused to store the msgs into the database (or did not mark it as successfully downloaded/stored). So had to refetch them again and again.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to thunderbird in Ubuntu. https://bugs.launchpad.net/bugs/1074260 Title: Thunderbird heavy IMAP traffic downloading messages Status in Mozilla Thunderbird Mail and News: Fix Released Status in “thunderbird” package in Ubuntu: Confirmed Bug description: Thunderbird (as of version 16?) generates a lot of IMAP traffic, continually redownloading messages. One issue has been resolved (see https://bugzilla.mozilla.org/show_bug.cgi?id=803843 and https://launchpad.net/bugs/1068921 ) but this issue remains. It is open in bugzilla as https://bugzilla.mozilla.org/show_bug.cgi?id=806760 To manage notifications about this bug go to: https://bugs.launchpad.net/thunderbird/+bug/1074260/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp