On 2010-02-10 Jeff Lacki wrote:
> Thanks, thats good advice for sure. Turns out Im not able to get to
> port 25 on my postfix box from my current location.
> Whats odd is that I went to 2 other servers on the net and I can
> telnet to port 25, but here at home, I cannot. I can telnet to port
> 22, 53, but not 25. I checked my iptables on both machines and even
> disabled them (flushed all the rules), no luck.
> Anyplace where postfix would deny a specific ip from even connecting?
> I cant imagine where that would be, especially because my IP is
> dynamic here at home.
The reason most likely isn't your Postfix, but the ISP blocking outbound
connections to port 25/tcp. The rationale behind this is to prevent home
computer bots from sending spam.
Use submission (SMTP with authentication enforced on port 587/tcp)
instead. You should use authentication (and encrypted connections)
anyway, if you want to relay through your MTA from anywhere in the
world. See Postfix' TLS README:
"Abstractions save us time working, but they don't save us time learning."