I've recently set up an exchange 2003 server and pointed my external DNS records to my external IP. I have checked with my domain service provider and they have confirmed that the settings are correct. From a user account on my internal domain I can send emails to external addresses fine, however when external emails try to send to the email the following error bounces back:

550 550 5.7.1 unable to relay. State 14

Any suggestions anyone? Thanks.


Have you configured your Recipient Policy to be authorative for the domain in question? If not, you need to do that.

  • Glad to help... – joeqwerty Aug 6 '10 at 11:22

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