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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.<br />
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?<br />
Ya know, when i typed it out it made sense.<br />

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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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I am using MS outlook to send emails and some of them are not delivered and I'm getting the following message: <br />
53 sorry, that domain isn't in my list of allowed rcpthosts(#5.7.1)<br />
i have matched all my pop3 and smtp server names, what is another way to start to &nbsp;solve this problem? 
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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? 

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

Microsoft Outlook is a personal information manager from Microsoft, available as a part of the Microsoft Office suite. Although often used mainly as an email application, it also includes a calendar, task manager, contact manager, note-taker, journal, and web browser.