troubleshooting Question

550 550 5.7.1 Unable to relay (state 13) Exchange 2007

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Eric Kung asked on
ExchangeOutlookEmail Servers
4 Comments1 Solution2125 ViewsLast Modified:
Please help, I have a domain abc.com with godaddy, MX is smtp.abc.com, and on the A record smtp points to our external IP address. When I setup my AD, I use corp.abc.com, so when I setup new user in exchange, their default email is @corp.abc.com, then I change it to @acb.com, users are able to send email out, but when someone send email from outside, sender get the following error: 550 550 5.7.1 Unable to relay (state 13). Thanks in advance.
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