Hi All,

   I have migrated my mailserver (from dovecot 2.2 on debian 10 to dovecot
   2.3 provided by the mailcow-dockerized project) by coping over the
   mailstorage directory "as is".

   There is now a single mailbox where I have an issue with duplicated mails
   - the "Sent" folder had approx 400 mails upon migration, it now has 4500
   mails with each mail duplicated several times. Below are the header lines
   of one message, besides the Message-Id the header is exactly the same on
   all copies.

   I tried "doveadm force-resync" on the mailbox and the mailbox was removed
   and recreated from scratch on the mail app but  we still get additional
   copies added  - anybody has an idea what is going on here and how to fix
   this?

   Oliver

     From: [1]"pre...@example.com" [2]<pre...@example.com>
     Content-Type: multipart/alternative;
         boundary="Apple-Mail=_451F3D0B-155E-46EF-9BFB-B8034A7E2AE1"
     Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3826.300.87.4.3\))
     Subject: Re: EXTERN: Re: Example Mail
     X-Universally-Unique-Identifier: 6CD82CDA-138B-412E-8D4D-74C8C82B72ED
     Date: Mon, 13 Jan 2025 11:17:09 +0100
     References:
     
[3]<db3pr05mb100724231a87b9ae130c0ee0c85...@db3pr05mb10072.eurprd05.prod.outlook.com>

     
[4]<db3pr05mb100725a1f1367c304ac417a9585...@db3pr05mb10072.eurprd05.prod.outlook.com>

     
[5]<db3pr05mb1007220945cc70cdacddba5d685...@db3pr05mb10072.eurprd05.prod.outlook.com>

     
[6]<db3pr05mb100724a5040fa029a29e625d185...@db3pr05mb10072.eurprd05.prod.outlook.com>
         [7]<09b63703-8bc4-484f-905a-899ba9a72...@example.com>

     
[8]<db3pr05mb10072f836f9fce2f9f626392d85...@db3pr05mb10072.eurprd05.prod.outlook.com>
         [9]<ba8a1660-fc7d-4478-9f5f-e8b062b39...@example.com>
         [10]<005d01db659c$cf2a48c0$6d7eda40$@john....@t-online.de>
     To: John Doe [11]<john....@t-online.de>
     In-Reply-To: [12]<005d01db659c$cf2a48c0$6d7eda40$@jon....@t-online.de>
     Message-Id: [13]<a03e3b7a-638a-4482-83d8-c5b297d99...@example.com>

 --
 Protect your environment -  close windows and adopt a penguin!

References

   Visible links
   1. mailto:pre...@example.com
   2. mailto:pre...@example.com
   3. 
mailto:db3pr05mb100724231a87b9ae130c0ee0c85...@db3pr05mb10072.eurprd05.prod.outlook.com
   4. 
mailto:db3pr05mb100725a1f1367c304ac417a9585...@db3pr05mb10072.eurprd05.prod.outlook.com
   5. 
mailto:db3pr05mb1007220945cc70cdacddba5d685...@db3pr05mb10072.eurprd05.prod.outlook.com
   6. 
mailto:db3pr05mb100724a5040fa029a29e625d185...@db3pr05mb10072.eurprd05.prod.outlook.com
   7. mailto:09b63703-8bc4-484f-905a-899ba9a72...@example.com
   8. 
mailto:db3pr05mb10072f836f9fce2f9f626392d85...@db3pr05mb10072.eurprd05.prod.outlook.com
   9. mailto:ba8a1660-fc7d-4478-9f5f-e8b062b39...@example.com
  10. mailto:005d01db659c$cf2a48c0$6d7eda40$@john....@t-online.de
  11. mailto:john....@t-online.de
  12. mailto:005d01db659c$cf2a48c0$6d7eda40$@jon....@t-online.de
  13. mailto:a03e3b7a-638a-4482-83d8-c5b297d99...@example.com
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