offlineimap debugging - how can I get the Message-ID of a rejected mail?

Eygene Ryabinkin rea at
Tue Jul 1 04:56:59 BST 2014

Christian, good day.

Mon, Jun 30, 2014 at 01:07:21PM +0200, Christian Recktenwald wrote:
> I'm trying to synchronize a cyrus and a zarafa imap server.
> This does not work out as I get errors like these:
>  [imap]:   44:13.83 writer > AGludmFsaWQAc2VjcmV0\r\n
> Thread 'Copy message from Local-someuser at mail-zarafa:Public folders/some/folder' terminated with exception:
> Traceback (most recent call last):
>   File "/usr/lib/python2.7/dist-packages/offlineimap/", line 158, in run
>   File "/usr/lib/python2.7/", line 763, in run
>     self.__target(*self.__args, **self.__kwargs)
>   File "/usr/lib/python2.7/dist-packages/offlineimap/folder/", line 358, in copymessageto
>     new_uid = dstfolder.savemessage(uid, message, flags, rtime)
>   File "/usr/lib/python2.7/dist-packages/offlineimap/folder/", line 554, in savemessage
>     raise OfflineImapError(msg, OfflineImapError.ERROR.REPO)
> OfflineImapError: Saving msg in folder 'INBOX.some.folder', repository 'Remote-someuser at mail-zarafa' failed (abort). Server responded: NO ['Message contains invalid header']
> I thought it would help to understand what's going on if I just 
> new /which/ mail is rejected, so I could track it down on the file 
> system and investigate further.
> Therefore I'd need some more information regarding the rejected 
> email itself, like the Message-ID header.

It is not possible with the current OfflineIMAP releases, but I had
just pushed two patches to the "next" branch that will make you to be
able to see message-id of the failed content.

> Offlineimap is version 6.5.5-0.1 from Debian.

Not sure that you will be able to directly apply these patches
on top of 6.5.5: too many modification since that release.  You
can try to download current "next" from
unzip it and use the following wrapper script:

BASE=<directory you put unzipped files to>

if [ -z "$PYTHONPATH" ]; then
        export PYTHONPATH="$BASE"
exec python "$BASE"/ "$@"

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