Is your ISP blocking outgoing port 25?
randy at psg.com
Fri Jun 19 11:53:03 UTC 2009
> We just open port 2525 for customers from ISP's blocking official SMTP
> ports so they can use their dedicated servers/domain mailservers.
for personal use, i have a box that has sshd running on 443 and i tunnel
2525 through it. that worked even in the narita red rug when they were
at their blocking worst.
for customer use, i would push them to 465, 587 if less clued.
More information about the NANOG