[ale] Postfix problems - ripping my hair out

[jb at sourceillustrated.com (John Wells)]

Jay said:
> The ports are forwarded on the router, and they're open on the machine,
> and I can telnet into all of them except for 25.  Is this my ISP
> blocking port 25 for incoming instead of just outgoing?

I can think of a number of things that might cause this, but if you can't
hit 25 from the outside world, but can from the inside, it's obviously
either a router problem or a problem with your ISP.  What ISP are you
using, out of curiosity?