Can't you just forward using iptables - here's the equivalent for squid

Problem is, will anything be listening on that port?

ps - have you asked your ISP if they will open port 25?

Have you seen

http://www.dyndns.com/services/mailhop/outbound.html

I just tried the same mail server again using TLS but I get these errors:

Feb 8 22:24:16 durhamnetwork postfix/cleanup[3240]: 389505E0191: message-id=<Pine.LNX.4.64.0702082224090.3235@durhamnetwork.sytes.net>
Feb 8 22:24:16 durhamnetwork postfix/qmgr[3233]: 389505E0191: from=<root@durhamnetwork.sytes.net>, size=592, nrcpt=1 (queue active)
Feb 8 22:24:17 durhamnetwork postfix/smtp[3242]: setting up TLS connection to trifocus.net
Feb 8 22:24:17 durhamnetwork postfix/smtp[3242]: certificate verification failed for trifocus.net: num=18:self signed certificate
Feb 8 22:24:17 durhamnetwork postfix/smtp[3242]: certificate verification failed for trifocus.net: num=10:certificate has expired
Feb 8 22:24:17 durhamnetwork postfix/smtp[3242]: certificate verification failed for trifocus.net:certificate has expired
Feb 8 22:24:17 durhamnetwork postfix/smtp[3242]: certificate verification failed for trifocus.net:certificate has expired
Feb 8 22:24:17 durhamnetwork postfix/smtp[3242]: Unverified: subject_CN=smurfette.meathouse.trifocus.net, issuer=smurfette.meathouse.trifocus.net
Feb 8 22:24:17 durhamnetwork postfix/smtp[3242]: TLS connection established to trifocus.net: TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)
Feb 8 22:24:17 durhamnetwork postfix/smtp[3242]: 389505E0191: to=<taigon1984@hotmail.com>, relay=trifocus.net[66.25.148.34]:587, delay=1.3, delays=0.09/0.08/1.1/0, dsn=5.7.0, status=bounced (SASL authentication failed; server trifocus.net[66.25.148.34] said: 535 5.7.0 authentication failed)


What does it mean that my certificate has expired? I just created that certificate not long ago.

Guess what!! I got my isp's mail server to finally work!

Feb 8 22:47:56 durhamnetwork postfix/postfix-script: starting the Postfix mail system
Feb 8 22:47:56 durhamnetwork postfix/master[3491]: daemon started -- version 2.3.3, configuration /etc/postfix
Feb 8 22:51:01 durhamnetwork postfix/smtpd[3501]: warning: dict_nis_init: NIS domain name not set - NIS lookups disabled
Feb 8 22:51:01 durhamnetwork postfix/smtpd[3501]: connect from localhost[127.0.0.1]
Feb 8 22:51:01 durhamnetwork postfix/smtpd[3501]: 99B575E018F: client=localhost[127.0.0.1]
Feb 8 22:51:01 durhamnetwork postfix/pickup[3492]: 9F3EC5E0191: uid=0 from=<root@durhamnetwork.sytes.net>
Feb 8 22:51:01 durhamnetwork postfix/cleanup[3504]: 9F3EC5E0191: message-id=<Pine.LNX.4.64.0702082250550.3500@durhamnetwork.sytes.net>
Feb 8 22:51:01 durhamnetwork postfix/smtpd[3501]: disconnect from localhost[127.0.0.1]
Feb 8 22:51:01 durhamnetwork postfix/qmgr[3493]: 9F3EC5E0191: from=<root@durhamnetwork.sytes.net>, size=592, nrcpt=1 (queue active)
Feb 8 22:51:02 durhamnetwork postfix/smtp[3506]: setting up TLS connection to smtphm.sympatico.ca
Feb 8 22:51:02 durhamnetwork postfix/smtp[3506]: Verified: subject_CN=smtphm.sympatico.ca, issuer=Entrust.net Secure Server Certification Authority
Feb 8 22:51:02 durhamnetwork postfix/smtp[3506]: TLS connection established to smtphm.sympatico.ca: TLSv1 with cipher RC4-MD5 (128/128 bits)
Feb 8 22:51:03 durhamnetwork postfix/smtp[3506]: 9F3EC5E0191: to=<taigon1984@hotmail.com>, relay=smtphm.sympatico.ca[65.54.191.190]:25, delay=1.7, delays=0.05/0.09/1.1/0.47, dsn=2.6.0, status=sent (250 2.6.0 <Pine.LNX.4.64.0702082250550.3500@durhamnetwork.sytes.net> Queued mail for delivery)
Feb 8 22:51:03 durhamnetwork postfix/qmgr[3493]: 9F3EC5E0191: removed


Message was delivered from root@durhamnetwork.sytes.net. Issue resolved for now:P hehe

That's good news