IIS, SMTP, and DNS resolution

Hi there.

I have a webserver (windows2000 running cdosys) that generates a lot of
emails to a particular domain. This domain is of a customer that is
directly connected and wishes me to configure the server with a hosts
entry to point to the inside address of their mail server.

I have done this, but tcpdumps on the firewall indicate that the
system is still attempting to resolve DNS for this domain via our DNS
server and then send the mail out via the public address. I can ping
the name of the mail server and it seems to use the hosts entry fine,
but the auto generated messages via iis do not do this.

Please help me understand IIS/CDOSys DNS better so that I might
understand why it is behaving this way.

TIA!

Googleboy

.

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