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553 sorry, that domain isn't in my list of allowed rcpthosts(#5.7.1)

Posted on 2003-11-11
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Last Modified: 2012-06-21
I am using MS outlook to send emails and some of them are not delivered and I'm getting the following message:
53 sorry, that domain isn't in my list of allowed rcpthosts(#5.7.1)
i have matched all my pop3 and smtp server names, what is another way to start to  solve this problem?
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Question by:craigerr
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Mihailo earned 250 total points
ID: 9730549
You need to authenticate when using SMTP.

In the Internet E-mail settings (POP3) window, click "More settings" and open "Outgoing server" tab and check "My outgoing server SMTP requires authentication"
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by:craigerr
ID: 9737851
So i was not authenticated on that ISP or network provider, i need to put the correct account or authenticated account in the outgoing server to send mail.
I used my default account and when i added my other email accounts i used those default outgoing server names, obviously not able to use those on a different ISP or network with out authentication, correct?
Ya know, when i typed it out it made sense.
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