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  2. DOMINO400
  3. October 2008

Re: SMTPClient: ReceiveResponse: 451 Requested action not taken because the message failed RFC compliancy checks

Rob:

Take a look at the message header (View - Show - Page Source) and you will
see something like this:

Final-Recipient: rfc822;somename@xxxxxxxxxxxxxx
Diagnostic-Code: smtp; 503 Aquila Antispam: Must have sender and
recipient first.
Remote-MTA: dns; mail.somedomain.com
Action: failed
Status: 5.0.0

which will tell you where it failed and maybe a little more information.

I'm with Patrick - it sounds like you need to call the receiving Messaging
Administrator.

HTH.

Gregg


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