SMTP from outside LAN doesn't work

HeadlessHorseman · May 9, 2008, 9:13 PM

I have IMAP and SMTP working perfectly inside my LAN even for internet mail, but when I am at home or away, I can receive emails, but I can't send. Here are the firewall rules I have in place. 172.30.0.18 is my Exchange box.

WAN
Proto Source Port Destination Port Gateway
TCP/UDP * * 172.30.0.18 25 (SMTP) *
TCP/UDP * * 172.30.0.18 143 (IMAP) *

Thanks!

Cry Havok · May 9, 2008, 10:33 PM

Right, what do the logs on your Exchange host/mail client show?

My 0.02 <currency>bet would be that you've not configured Exchange/your mail client correctly to allow for relaying outside of the local LAN. Not having touched Exchange since the days of Exchange 5.5 though I am only guessing ;)</currency>

HeadlessHorseman · May 10, 2008, 12:42 AM

I checked the relays and made sure my server's ip address was in there and it was. I enabled logging and will come back to it when I get a chance. Thanks for the input. I guess you bring up the valid point that it might not be the firewall. Do I have all the rules I need setup properly?

Cry Havok · May 10, 2008, 6:09 PM

If you also configured port forwarding, yes (hint, if you haven't delete the rules and then just configure the port forwarding, that will also create the correct, matching, firewall rules).