<DKIM> UID for syncing messages

[Nicolas Sebrecht]

On Tue, Jun 12, 2018 at 06:02:15PM +0000, Jethro Tull wrote:

>    does offlineimap use the Message-ID in the email header to see if it is
>    already in the destination folder or does it use a UID the imap server
>    uses to number the emails? I noticed that mbsync was using something else
>    than the Message-ID in the header. The latter is what mutt uses to mark
>    emails as duplicates.

offlineimap uses the UID if the server supports UIDPLUS IMAP extension
and a X-OfflineIMAP header otherwise.

-- 
Nicolas Sebrecht