550 NOLUSRRLYNET Error?

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Kogo
Posts: 111
Joined: Tue Oct 14, 2003 2:56 pm

550 NOLUSRRLYNET Error?

Post by Kogo » Mon Feb 09, 2004 3:42 pm

Some of my emails to some domains are getting:

Remote SMTP Server Returned: 550-NOLUSRRLYNET- Please use the SMTP server provided by your ISP. 550 relaying to <username@domain.com> prohibited by administrator

Any idea as to the specifics? What do I need to do to be recognized as a valid source?
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