My postfix mailserver won't receive mail (FC6)

[guywood13]

I'm running postfix on an FC6 server and I'm having trouble receiving mail into the server... This is all part of a university project, btw.

Here is a graphic of the infrastruture I am using just to aid my explanation [img=http://img404.imageshack.us/img404/6370/helpmailqm2.th.jpg]

Basically, I can send out mail fine by relaying all the emails via my ISP's smtp server but any messages I send to, root@linux.mydomain.com from an out address for instance, just get lost in cyber space.

Now, i obviously own the domain and have configured the MX records (provided by the company i bought the domain off) in many different variations to try and get mail to route to my mailserver. But, I have had no joy...

I believe the problem could be a number of things.

1. The way I have configured the MX records using the domain name providers website is wrong and mail isn't routing correctly my external IP
2. DNS needs to be configured on the mailserver? I haven't been able to do this as the main guide I have been following is Suse based and uses yast (which isn't bundled with FC). So I don't know how.
3. firewall issue maybe?... but i doubt it.

If anybody could shed a bit of light on this for me or has any suggestions, I would be very grateful. Thanks.

[40esp]

You need to use your hostname, not a domain with an MX record.

To obtain your hostname Go Here

And set your FQDN to the hostname up there.

oh yah, remember to edit /etc/hosts

add a line for:

YourIP YourHostname.com YourHostname

Follow The Template in the file you will get the idea.

Good Luck

[bradchaus]

you should probably make certain also that port 25 is accepted by your firewall.

[guywood13]

Thanks for the replies chaps!

Managed to get it working now... it was a firewall problem on my router.

Ta!