On Mon, Dec 22, 2003 at 12:53:55AM +0100, Predrag Micakovic wrote: > When i try to telnet public.ip.add.ress from outside, I connect > just fine to my pop3 and imap ports, but I get no reply from smtp > whatsoever. When I try to telnet to the private address from the > DMZ or lan subnet, it works just fine. I figure, if my pop3 and > imap work, why the hell is port 25 so problematic, and it ought > to work as well.
Perhaps your ISP filters port 25 due to fear of worm propogation. However... > The mistery goes further. When I tried to send mails from my mail > server located in DMZ, I failed, the connection timed out and the > message goes to the deferred queue. However, when I try to send > an email to , for example, [EMAIL PROTECTED] I get it just > fine. What a misery. Since you can receive mail from others, I guess this rules out the first theory. Have you tried removing all the pf rules and just using redirection? Also, try running tcpdump on the mail server and the firewall while telnetting from the outside to your mail server's smtp port to see how far the connection goes. -Ray-
