Sendmail not sending mails outside domain

[110010]

Hi

I am a newbie for sendmail. I have setup my new sendmail server and configured. The problem im facing is i am able to send, receive mails properly locally, but when i send a mail outside my domain it fails.

Another thing is i am able to receive mails from outside, only problem is, not able to send mails to yahoo or hotmail or any other domain. Do i have to do anychanges to relay domains??

Please help me guys!!

Regds

 

[RhythmAce]

Here are a few things to check:

1. Make sure your domain's MX record is pointing to your ip.

2. Open /etc/mail/local-host-names and make sure your domain is listed along with any other domains your server hosts.

3. Opne /etc/mail/access and add "yourdomain.com RELAY" to the list. Then execute this command:

makemap hash /etc/mail/access.db < /etc/mail/access.

4. If you want to allow users to be able to send mail from outside your network, let's say from their home PC, you will need to add this line to sendmail.mc:

FEATURE(`relay_local_from')dnl note that the first ` is a back tic not '. It is the one on the same key as ~. When you are done editing, issue this command:

m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf

You will want to be careful any time you allow relaying from the outside world because there is a chance that your domain can be spoofed and allow relaying of spam through it. You may want to look up some good how-tos on securing your server.