Relaying Denied error in MS Exchange

Hi,
If I understand correctly, it looks like a misconfiguration of Exchange.

Where did you set the requirement to authenticate? If it was on the CONNECTIONS tab of the INTERNET MAIL SERVICE properties then it should be changed to FROM ANY HOST (SECURE OR NON-SECURE).

Now to the ROUTING tab. Make sure you select REROUTE INCOMING SMTP MAIL... and make sure you add an entry for each internet domain that you want Exchange to accept email for.

That should be all unless there were a lot of other changes made to the IMS.

Cheers!
~Sean

Hi,

on the routing tab you have to select, "reroute incoming smtp mail" and add the domian(s) (your domain) that you the exchange server may reroute.

Leopold

How is your IMC configured as far as the outbound server - are you sending your mail to the ISP's smtp server or to its DNS server? This would be in the IMC settings on the tab where you have all the settings for outbound mail (sorry - it's been a while since I ran an Exchange 5.5 server, so I can't remember the name of the tab). You should have a server name or IP address in a box on that tab pointing to a server at your ISP. This should be the ISP's DNS server name or IP address, not the ISP's SMTP server. If it's the ISP's smtp server, that may be why you are seeing the behavior - the ISP's SMTP server is denying relaying by your server. BTW, Microsoft recommends putting in the IP address rather than the server name, but if you do this, you need to keep tabs on your ISP to make sure they don't switch their DNS server IP addresses around.

Hope this helps!