Error message: 550 host unknown

D

dlc

Lately messages I have sent have been bouncing back with the error message:
550 host unkown. I am sending to valid addresses, so I don't know why they
aren't working.

I recently created a distribution list with about 30 addresses - that's when
the problem started occuring. Could it related?

I contacted my ISP but they claim it is an Outlook problem.

Thanks for any help you can offer.
 
B

Brian Tillman

dlc said:
Lately messages I have sent have been bouncing back with the error
message: 550 host unkown. I am sending to valid addresses, so I
don't know why they aren't working.
Click to expand...

Post the complete text of one of those errors (but change the username
portion of any address so as to avoid posting a real address). Include your
Outlook version as well.
 

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