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Home » GFI User Forums » Kerio Connect » Outlook Return Receipt Error
Outlook Return Receipt Error [message #152490] Mon, 15 August 2022 09:53
AndreasL is currently offline  AndreasL
Messages: 123
Registered: July 2008
Location: Germany
Kerio Connect V9.4.2 (6498)
someone read a lot of old mails in Outlook and generate a return receipt as requestet.
In Kerio Connect I see the following error log entry for each return receipt:

[15/Aug/2022 08:55:08] mail_queue.cpp: TNEF decoding of message D:\kerio/queue/27/62f9edcc-000001c5.eml failed: TNEF stream contains unsupported properties

In Kerio webmail interface I see a return receipt mail with a 'winmail.dat' file attachment. I download the winmail.dat and take a look inside. It seems to be a valid return receipt from Outlook 2016.

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