We haven't seen similar issues reported. The most probable cause is that the out of office message probably contained an invalid recipient, but there is not enough information to say for sure. If you cannot determine this by investigating the headers of a problematic out of office message, then I suggest opening a support case (hopefully you will have the headers available, upload them to the case if created).
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Support Engineer
* Integrated Cyber Defense Exchange
* Messaging Gateway
* Packet Shaper
Symantec Enterprise Division
Broadcom Software
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Original Message:
Sent: Aug 04, 2022 06:46 AM
From: Lothar Huck
Subject: Reject of Out-of-Office from Exchange
Reject of Out-of-Office Messages from Exchange
SMG says From (none) Subject (None) Action Reject ... Reipient invalid ...
Same Sender no Out of Office Messages - No problem
Tested with different Senders.
So i ask What is this ?
SMG has a problem with Automatic Out of Office Messages ? What ?