This bug has been bothering me for some weeks now. I decided to try Thunderbird (under Windows!), because of its conversation-view capabilities, and wanted it to be used by some computer-illiterates as well, but this redownloading IMAP-stuff reduces Thunderbird to a small incrowd aware of gloda and dirty cache only.
I Googled the origin of the problem: I found some very intersting comments dating from 2009 about some messages not completely downloading: https://bugzilla.mozilla.org/show_bug.cgi?id=341225 Bug 341225 -IMAP: Thunderbird caching incomplete downloaded https://bugzilla.mozilla.org/show_bug.cgi?id=468595 see comment 17 about the risk of a fuzz factor heuristic to fall down, which it does in our case. This heuristic seems to be a workaround for not downloading messages completely by different threads, (inline images and attachments), while for some reason the download of a part marks the download of the rest as done. So I guess anyone willing to fix this issue should separate these two download-statusses and kill this previous workaroud. ** Bug watch added: Mozilla Bugzilla #341225 https://bugzilla.mozilla.org/show_bug.cgi?id=341225 ** Bug watch added: Mozilla Bugzilla #468595 https://bugzilla.mozilla.org/show_bug.cgi?id=468595 -- 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 : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

