553 sorry, that domain isn’t in my list of allowed rcpthosts
September 21st, 2011
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The message could not be sent because one of the recipients was rejected by the server. The rejected e-mail address was 'me@shahbazhk.com'. Subject 'testing email', Account: 'mail.ghazalz.com', Server: 'mail.ghazalz.com', Protocol: SMTP, Server Response: '553 sorry, that domain isn't in my list of allowed rcpthosts (#5.5.3 - chkuser)', Port: 25, Secure(SSL): No, Server Error: 553, Error Number: 0x800CCC79
The error is basically in Outlook, and requires you to check the option on “My Server requires Authentication”
Open outlook >> Tools >> Accounts
Click on mail account, and click on Properties
There click on Server tab, and you will see option “My Server requires Authentication”, click that check box.
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