Unplanned Outage: Due to a technical glitch, customers might see higher wait times on Sophos Call Lines. We request for your kind cooperation. Please prefer logging a case via Sophos Support Portal, unless the situation is critical for you.

This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Undelivered Mail


when i try to send some messages to some recipients i face this problem
i don't know if this problem in exchange server or email gateway in sophos
but as you can see the response came from sophos

This thread was automatically locked due to age.
  • HI There,

    The issue occurs because the recipient Email server does not verify the recipient address and considers it invalid (genuinely or not that we can not be sure of). Please reach out the Email admin of the recipient Email server.


    Ex-Sophos Member