[Tickets #12945] ActiveSync: Deleting one email in Outlook 2013 results in two mails in Outlook 2013 trash folder

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Ticket URL: http://bugs.horde.org/ticket/12945
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  Ticket             | 12945
  Created By         | chrissi at amusing.de
  Summary            | ActiveSync: Deleting one email in Outlook 2013 results
                     | in two mails in Outlook 2013 trash folder
  Queue              | Synchronization
  Version            | Git master
  Type               | Bug
  State              | Unconfirmed
  Priority           | 1. Low
  Milestone          |
  Patch              |
  Owners             |
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chrissi at amusing.de (2014-01-30 13:49) wrote:

Hello,

I experienced a litte bug when using Outlook 2013 via ActiveSync to   
connect to Horde.
When I delete an email in Outlook 2013, it is moved to the trash  
folder correctly. After a few seconds exactly the same email appears   
in the trash folder, so you now see the deleted email twice.
This second email appears only in Outlook, you don't see it in the  
Horde webmail trash.
If you compare the header of the two emails, it slightly differs in   
the "Content-Type" field, everything else is exactly the same.

Deleted email:
Content-Type: multipart/alternative; boundary="=_7CrMzMy6GwiFZgAVh3gsUw9"

Email which appeared some seconds later:
Content-Type: multipart/alternative; boundary="=_yt_nh4i36nWWv2czhvKVfQ1"

It seems as when the deleted email is synced to Horde it's header gets  
changed, so Outlook 2013 sees it as a new item and downloads it again.

If you need any further information please don't hesitate to contact me!

Best regards,
Christian Hailer