OK, I have found where the error is. 1. Changed the rdr rule, did telnet to port 2025 from outside, redirected to my server to port 25, works fine. Obviously, the ISP is blocking port 25. Bad ISP.
2. As for outgoing mail, I tried relaying to ISP smtp, works. Again, ISP does not allow mail to be sent directly. I must say, I do not like relaying to their mail server. I would prefer to send mail directly. Thank you all for help. Predrag --
