Help with DNS/MX Record!

[L33]

Hi
Never done this before so I'm sure its just something silly that I've done. I've bought a domain name from 1and1, and am trying to set up DNS / mail exchanger record.

(Obviously these are not the 'real' details )
Server IP is 10.20.30.40 (no ports blocked at all)
Registered domain name is "test.co.uk"

In the 1&1 control panel, I've the following:

DNS: test.co.uk, A Record: 10.20.30.40, MX Record: mx.test.co.uk
DNS: mx.test.co.uk, A Record: 10.20.30.40

Is that correctly set up?
In either case, mail is not coming through. The mailserver is running fine, I can telnet to 10.20.30.40 ports 25/110/143.
- I can ping test.co.uk and it resolves to 10.20.30.40
- I can ping mx.test.co.uk and it resolves to 10.20.30.40

mxtoolbox.com's lookup tool brings back the following details when I check against the 'test.co.uk' domain:
Preference: 10, Hostname: mx.test.co.uk, IP: 0.0.0.0, TTL: 86400
No idea why it is returning 0.0.0.0

EDIT: Mails sent to an account *@test.co.uk are coming back saying unable to find IP/MX record.

If anyone can help it'd be much appreciated

 

[L33]

Thanks for all the help guys
Must've just taken ages to propagate, I made the changes Monday morning and suddenly its just started working, and mxtoolbox etc sees the correct ip for my mx record.

Thanks again for the replies