[ILUG] Setting Up Postfix and Courier

[Conor Mac Aoidh]

Hi,

I've been trying to setup Postfix and Courier on my server ( running Fedora
15 ). It's my first time trying to do something like this on a live server,
so if anyone wants to add any advise/recommendation they are welcome. I've
been following a guide located here:

http://library.linode.com/email/postfix/courier-mysql-fedora-13

I've pretty much got everything installed/configured as it says in the
guide but I'm still having a few problems. I've set my hostname in postfix
as mail.mydomain.ie ( where mydomain is an actual domain ) and I added an
MX record for this ( and I think this may be where the problem lies ) which
looks like this:

Record Host: mail.mydomain.ie
Record Data: mail.mydomain.ie
Preference: 20

When I try and issue the command 'telnet localhost smtp' on the server I
get the response "Connection closed by foreign host.", though it is working
for pop3 and imap. So there has to be something going wrong with the smtp
setup. What I'm looking for is advice on how to troubleshoot the problem,
are there any error logs or anything I could be using to find out what's
going wrong?

Thanks for any input
---
Conor Mac Aoidh