SMTP Mail relay server

[Jaz]

Can anybody give me information on what it would take to setup a SMTP mail
relay server on our DMZ.

Or Could anybody direct me to some documentation on setup and configuration
on this server along with what needs to be done to the firewall.

Thanks,
Jasper

 

[Leif Pedersen [ MVP]]

Hi,

You can use for example the SMTP that is included in windows server IIS.

For it to work you need to configure your SMTP domain as a non local domain
and forward all mails for this domain to your internal exchange server. You
need to allow your exchange server to relay through the SMTP server and you
need to install antivirus and antiospam software on the server.

The firewall needs to have SMTP port open, NNTP port, DNS port and the ports
your antivirus and antispam needs for updates

Leif

 

[Enkidu]

I would only open ingoing port 25 on the firewall for traffic to the
exchange server from the mail Relay. I would allow outgoing port 25 to
any Internet address, but only from the Exchange server. You should not
need DNS ports to be open if the Relay has a DNS client and is
configured with external DNS servers, and then only if the Mail Relay is
checking DNS of incoming mail for AntiSpam. I would configure only the
IP address of the firewall in the Relay's 'hosts' file. I would
configure the SMTP Relay to get its own Antivirus and AntiSpam updates.
I don't see the need for the NNTP ports unless you are doing News, which
most people don't.

Cheers,

Cliff

 

[Jaz]

Is there a way to test this server without having to change the firewall
routing.

I want to make sure that once we change the firewall, we the server will
work properly.

Thanks,
Jasper

 

[Guest]

Is there a way, to block or to pass relay test, when you encapsulate fake
e-mail … "(e-mail address removed)"@pass.email These is Test 8 on
http://www.abuse.net/relay.html.

Thank you for replay

Is there a way to test this server without having to change the firewall
routing.

I want to make sure that once we change the firewall, we the server will
work properly.

Thanks,
Jasper