My email server sends mails but does not receive
 

My email server sends mail but does not receive

I can send mail using a mail server I have at home, I have a domain name I got at www.dyndns.com, but when I send mails to it they won’t get delivered.

Is it because I don’t have the MX record?

If you didn't setup an MX record, that's most likely the problem. What is error that is returned when sending? Other details about your setup always helps too.

Same Here,
 

Same here. i set up ubuntu server 10.04, i can send mail, but i cannot receive mail from yahoo. but i can receive mail from my localdomain