Office Outlook from System Administrator - Undeliverable

T

TRS

At random receive a message when replying to a received
email"553 sorry, that domain isn't in my list of allowed
rcpthosts(#5.7.1)
How do I overcome this problem?
 
D

Diane Poremsky [MVP]

the server the person you are sending to is blocking your mail for one
reason or another. You can't do anything, except use a different SMTP
server.
 
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