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sent a "rcpt" command, and the SMTP server responded with "550 5.7.1 Unable to relay for

Posted on 2009-05-18
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Last Modified: 2012-05-07
This is not an open relay issue
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Question by:London_Riverside
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by:Froggy_chris
ID: 24411576
"Question: This is not an open relay issue".. so waht is the issue ? :)

Can you please detail a bit ?
"550 5.7.1 Unable to relay for" is very likely related to a typo in your command-line, or, if you think you've typed it right, it might be a misconfiguration on your mail system (not set to accept mail for the domain you are trying to send a mail to).

Please tell us what you're doing, and how your systems look like...
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Accepted Solution

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London_Riverside earned 0 total points
ID: 24468167
Apologies - I had no idea that I actually posted this fragment of an event viewer message.
FYI  - the unable to relay message was being caused by one user who had (God alone knows why) added a Pop3 account to her mail profile on a machine where she is a Power User.
She had then pointed the POP3 account at the Exchange Server and (wait for it), omitted to enter a password. The crowning glory was to make this her primary account ergo the inability to relay.
Thank you for the response anyway.
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