Server responded with 'NO'

Dave Abrahams dave at
Mon Aug 15 11:48:45 BST 2011

on Mon Aug 15 2011, Sebastian Spaeth <> wrote:

> On Sun, 14 Aug 2011 22:29:25 -0400, Dave Abrahams <dave at> wrote:
>> --8<---------------cut here---------------start------------->8---
>> handler: DEBUG[imap]:   15:52.46 handler NO response: Some messages could not be FETCHed (Failure)
>> Copy message 71049 from [Gmail]/All Mail: WARNING: ERROR attempting to copy message 71049 for account BoostPro:Traceback (most recent call last):
>>   File "/Library/Python/2.6/site-packages/offlineimap/folder/", line 250, in copymessageto
>>     message = self.getmessage(uid)
>>   File "/Library/Python/2.6/site-packages/offlineimap/folder/", line 215, in getmessage
>>     raise OfflineImapError(reason, severity)
>> OfflineImapError: IMAP server 'BoostProRemote' responded with 'NO' to fetching message UID '71049'
>> --8<---------------cut here---------------end--------------->8---
>> Oddly, when I run with imap debugging logged to a file, offlineimap
>> continues after the error, but if I simply invoke "offlineimap," this
>> failure causes offlineimap to stop/exit/crash.
> Thanks for the log. You get a "NO Some messages could not be fetched"
> From the Gmail server, which is a mysterious message on their end that
> they refuse to send you one of your messages. Not much we can do about
> this. 
> But our behavior is buggy and your log and report helped me to find some
> bugs on our end. Skipping single message failures worked in
> single-thread mode (which is turned on using debug) but not in the
> normal multi-threaded mode.
> This is because I was catching exceptions of newly started threads, but
> python doesn't bubble exceptions up to the parent thread, it immediately
> aborts! The following patches fix this behavior and simply skip the
> failing message (logging an error).
> I recommend applying those patches as this makes skipping messages work
> correctly.

Thanks for your work!  I tried applying these to master, but:

  $ git --no-pager am /tmp/m1
  Applying: Fix error handling in folder.Base.copymessageto()
  /Users/dave/src/offlineimap/.git/rebase-apply/patch:78: trailing whitespace.

  error: patch failed: offlineimap/folder/
  error: offlineimap/folder/ patch does not apply
  Patch failed at 0001 Fix error handling in folder.Base.copymessageto()
  When you have resolved this problem run "git am --resolved".
  If you would prefer to skip this patch, instead run "git am --skip".
  To restore the original branch and stop patching run "git am --abort".
  git exited abnormally with code 1.

Dave Abrahams
BoostPro Computing

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