mail does not work

hi all
i install ubuntu 8.04 perfect setup and ispconfig
i setup web page works fine
but mail does not work and cannot ping mail.xxxxxx.com
what is dns records ?
webmail works fine
port 25-110 forward to web server on my dsl modem

 

Any errors in your mail log?

 

thx for reply
i look my server and server works fine my local network but i try ping other place my domain return local ip not global ip and cannot open my page i am forward 80 and 53 ports to server ip in dsl modem any idea pls?

 

Are there any errors in your mail log?
What's in /etc/resolv.conf?

 

in etc/resolv.conf
nameserver 192.168.2.1

 

Please try

Code:

nameserver 145.253.2.75

instead.