SMTP on port other than 25 through DNS???

[Dan Chaney]

> 
> >I get an IP address through dhcp from roadrunner
> >(cable access).  I also have a second-level domain
> >name resolving to this address through dynamic DNS
> >(nameservers at easydns.com).
> >
> >Problem is that roadrunner blocks port 25 so I
> >can't get any incoming mail. 
> 
> I though incoming mail was on port 110 (POP3) or IMAP (not sure which
> port) SMTP on port 25 is for sending mail
> 

Nope, POP and IMAP are end or leaf approaches, SMTP is for transport.
My guess is this person wants a 'real' mail server instead of an end
reader.

> >I'm worried that I can't do this, but I'm out of
> >other ideas or alternate high-speed ISP's.  If
> >not, any suggestions on other ways to get around
> >this (roadrunner only blocks port 25, will unblock
> >it for additional $150/month, 
> 
> What a rip-off!!
> 

Nah, only a rip-off if you allow it to be.  There must be a way around
this, though at first glance, I don't see how to get a sendmail
daemon to deliver anywhere but port 25.  I thought there was an option
for both inbound and outbound ports, but that may have been years ago.

Hey! That's an idea, maybe this kind of port-25 blocking silliness
will be *just* the thing to bring back UUCP from the dead!  Port 540
shouldn't be blocked..what was that, the T protocol? *grin*

> >which is not
> >feasible for me)?  All suggestions and/or pointers
> >appreciated.
> 

Best guess, find a sendmail-like creature (smail, procmail, etc.)
that will allow you to specify the delivery port, find someone 
with a sense of humour to be your co-conspirator in an end-run on
the silly $150/month or just use a fecthmail-like system via POP.

-dan, who bets MMDF coulda done this in no less than 15 files!