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550 5.7.1 Unable to relay

Posted on 2007-11-22
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Last Modified: 2008-02-01
i have setup exchange 2003 for sbs, the ad domain is "original.com", i have configure my users with a second email domain "second.com" for external mail. internal mail is working fine but when i try to send external mail i get an error :The message could not be sent because one of the recipients was rejected by the server. The rejected e-mail address was 'support@client.com'. Subject 'test6', Account: '192.168.0.6', Server: '192.168.0.6', Protocol: SMTP, Server Response: '550 5.7.1 Unable to relay for support@client.com', Port: 25, Secure(SSL): No, Server Error: 550, Error Number: 0x800CCC79
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Question by:ocmwila
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Expert Comment

by:mcse2007
ID: 20333312
Is second.com a registered domain name ?

Looking at the MX record, your domain name is pointing to a private ip address ?

> second.com
Server:  mygateway1.ar7
Address:  192.168.1.1

Is that your registered domain name? if yes then private ip address are not routable to the public network.
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Author Comment

by:ocmwila
ID: 20333325
the domains i have put in my question are for example only. the ad domain is not registered, but i have a registered domain which i want to you use for external mail
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mcse2007 earned 500 total points
ID: 20333360
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Author Comment

by:ocmwila
ID: 20333410
there is a link in the link that you gave me that doesnt work, so i am still stuck
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Author Comment

by:ocmwila
ID: 20333417
...and how do i configure my smtp service to accept mail from my domain(external and internal domain) asuming that thats the problem
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Expert Comment

by:Sembee
ID: 20333938
Have you added the second domain to recipient policy in ESM? You cannot just add a domain to the user accounts - Exchange will not accept the email unless it is in recipient policy.

Simon.
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Author Comment

by:ocmwila
ID: 20337340
the comment by  ID: 9275419 int the link given by mcse2007 help to guid me. basicaly since my recipient policy was fine the only other issue the it guded me to was authentication. my exchange server requires authentication to smtp server. i believe this is a default setting in my version of exchange.
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by:mcse2007
ID: 20337350
hey ocmwila,

I should get the max points for this ?

:-)
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by:mcse2007
ID: 20337362
glad to help ocmwila !

cheers, mcse2007
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