Exchange and SMTP

[OneMadCoder]

We have a pretty large newsletter roughly 900,000 subscribers. The program we use can send direct or through our mail server. We have one exchange server behind a sonic hardware firewall.

What I need to be able to do is send our newsletter from here instead of an outside network. When I try to send it here, it won't connect to the smtp server, but of course from an outside connection it will.

Before I go scoping around sonic's configs I figured I would ask here first. Do I need to open port 25 in the firewall (which I don't see why it would be blocked anyway) or does it have something to do with exchange.

I hope I explained this correctly.

I'm the Linux applications developer here so exchange is new me and our Windows admin left. So Tek-Tips has been a blessing for me.

 

[58sniper]

behind a sonic hardware firewall

Do you mean SonicWall?

So you want it to connect directly to your Exchange server?

Pat Richard
Microsoft Exchange MVP
Contributing author The Complete Reference: Microsoft Exchange Server 2007

 

[mjgolli]

When you say, "Won't connect to the SMTP server," do you mean from your computer connecting to the Exchange SMTP server or the outside SMTP server?

If you are sending the list via Outlook connected to Exchange, then there should be no reason that it would not connect.

If you are sending it from behind the firewall to an SMTP server outside, then port 25 is probably closed to outbound traffic except from the Exchange server.

My SonicWall is configured that way. This prevents a loose email virus/trojan/whatever from going bananas inside my network. Also prevents users from sending personal emails.

Hope this helps...
Mike G. MCSE MCDBA CCNA

 

[OneMadCoder]

I got it to work. It was soooooo damn simple that I can't believe I didn't try it to begin with. Instead of using smtp.domain.com like I would for a client outside the network. I simply directed it to: domain-sb1.domain.local.

Anyway. Thanks for the help, AGAIN.