Certain e-mails get bounced back to me with the following error.

L

Lance Stevens

Please help,

Certain contacts I could send to recently now come back
undelivered with the following error message. I have
looked into the knowledge base and nothing matches.

553 Sorry, that domain isn't allowed (#5.7.1)

Thank you in advance for any assistance.

Lance
 
J

Jeff Stephenson [MSFT]

You may need to authenticate to your outgoing server, which can be set up on
the "Outgoing Server" tab for your account.
 

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