Postfix can send Emails - but cann't receive any

[ilchubby]

Hello Guys.
I am new to all linux OS. I have got Ubuntu 6.06 installed (did follow the how toforge instructions).
Installation went smooth, the webserver Apache2 is working but I am struggling with the postfix I guess (it can be MX records though).
So, I have spent a month by reading the howtoforge about how to resolve the Email problem having Postfix with maildir. No luck.
I can send Emails to any address in the world but I do not receive neither email messages or bounce back.
Any help would be very much appreciated.

[falko]

Please make sure that the MX record for your domain is pointing to your server. You can check that with

dig mx yourdomain.com