User Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.85 Safari/537.36 Steps to reproduce: Drag msg from source (Local Folders/Inbox) to destination (imap-account/Inbox). Imap server throttles connections and sometimes refuses connections. Msg is deleted from source, and never appears at destination. Data loss. thunderbird 45.2.0 linux.
Looks similar to #522675
(In reply to kuneiyai from comment #1) > Looks similar to #522675 Perhaps. can you reproduce with same steps?
Severity: normal → critical
Component: Untriaged → Networking: IMAP
Product: Thunderbird → MailNews Core
Version: 45 Branch → 45
(In reply to Wayne Mery (:wsmwk, NI for questions) from comment #2) > (In reply to kuneiyai from comment #1) > > Looks similar to #522675 > > Perhaps. can you reproduce with same steps? I was probably thinking of bug 522675 comment 5 and (improved?) bug 522675 comment 7
So I tried to reproduce it as you asked, and looks like a discovered a new bug completely. Tried moving 6 msgs from my Local Folder to an IMAP folder. Switched to offline mode before it could copy. Then I quit thunderbird, and restarted it. Upon restarting, Offline mode was already disabled. 6 msgs were copied to the IMAP server, but it copied 6 copies of a single msg! The other 5 msgs were lost completely (its okay, just using test msgs). So there is another data loss bug for you. But I think my original bug was different, possibly being triggered specifically by the IMAP server rejecting a connection because of connection rate limiting. Anyone have any idea how to duplicate that?
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