Okay, here's my setup.

I have an Private Network and a DMZ all connected through a firewall that is connected to the outside world.

- Inside the DMZ I have 2 DNS servers (Fedora 5) and 1 web server (Slack11)
- I am running email via M$Exchange in the private network.

I am trying to use sendmail to send an email from my webserver(DMZ) to my internal network without opening up a connection directly from the DMZ to the private network.

Sendmail works great when I send email to anything outside of our domain. The problem is happening when I send email to anyone in our domain.

IE:
I want to send an email to "user@mydomain.com". This is an actual mailbox on the M$Exchange server, in the private network. BUT - It gets rejected saying "mailbox not found"

When I send an email to "root@mydomain.com" - which is _not_ a mailbox on the M$Exchange server, the email is delivered to "root" on my webserver.


I think sendmail thinks it's the only mail server on my network.

Ideally I'd like to have the email go out to the net, find our public IP address, and try to come in from that direction seeing how a direct connection from the DMZ to the private network is not going to happen.


Any help would be appreciated.

I'm not quite sure how much off the track I am on this, but try editing the "/etc/mail/local-host-names" file. Just comment out your domain. Then it *should* send it out to public dns.

Hopefully anyway.

Give it a shot?

This is how my file looks. The commented out lines begin with #'s. You should probably restart all lamp services after making the change.

Thank you for the reply.

That didn't seem to do it. I didn't have any domains added in that file when I originally set it up and have since double-checked to make sure no domains are listed.

Any other ideas?

Sorry man, you've tapped the extent of my impressive internal knowledge base.