[TriLUG] Postfix Woes

[Aaron Bockover]

Oooh! This may not be a total Postfix issue after all. The name servers
for my domain (rmmp.org) are at ZoneEdit. I have an MX record set to
mail.rmmp.org. 

When I telnet to rmmp.org (25 or 26, depending on what network I'm
behind), I can talk with the SMTP server. However, when I try to get to
mail.rmmp.org, I get a host not found. I'm hoping this is where the
problem is. Seems quite likely.

In ZoneEdit, under my MX config for the domain, I have:

mail.rmmp.org "handles mail" 1st "for domain" rmmp.org

For the IP (A) records, I have rmmp.org and www.rmmp.org pointing to the
IP address of the server. Do I also need a mail.rmmp.org A record mapped
to an IP address? My initial thoughts that were since mail.rmmp.org
"handles mail" for rmmp.org, and rmmp.org has an A record, I wouldn't
need one explicitly for mail.rmmp.org. I'm going to give this a shot,
but still don't know if it's correct.

--Aaron

On Wed, 2005-04-13 at 01:27 -0400, Aaron Bockover wrote:
> Okay, having never worked with Postfix or any email system before, other
> than web-based user administration on my shared hosting systems, diving
> head first into the world of email systems is slightly overwhelming,
> considering the time restrictions I am under.
> 
> I am right now just working with Postfix. I have the server set up, and
> it is delivering mail into user Maildirs (/home/user/Maildir). I can
> connect to the SMTP server from localhost and send a message without a
> problem. I can connect via telnet from my desktop (which is on a
> completely separate network), actually through port 26 (set up a
> iptables rule on the server to forward 26->25, thanks Earthlink!) and
> send a message.
> 
> The problem is sending a message through Earthlink's SMTP server, as set
> up in Evolution. My Postfix server is denying the message relayed from
> the Earthlink SMTP server.
> 
> I was thinking that the "mynetworks" and "mynetworks_style" settings in
> main.cf have something to do with this? 
> 
> Does anyone have a config that I can work with that handles the
> following goals:
> 
> 1. Accept incoming SMTP connections from anywhere and messages bound for
> the local server
> 2. Do not relay messages from any other host except the local server
> (and other hosts manually specified) to remote SMTP servers
> 
> If I can get mail delivered from any SMTP server to mine, then I think I
> can really get going with Postfix, and move on to virtual domains and
> users, and then getting Courier-IMAP set up to read the Maildirs.
> 
> I'd also appreciate any other Postfix/Courier-IMAP related
> tips/tricks/articles that anyone may have to share! Email is the only
> system I'm not too familiar with! It'd be more fun if I had more
> time :-/
> 
> Thanks!
> 
> Aaron Bockover
> 
>