[pkhalid]

I have configure an account to Outlook. But I cant send a mail other than my domain.
My domain name is legalpundits.com. I can send mails only who have the same domain name.
Please help.
I cant send mail to others like gmail or yahoomail

[chronk]

I am not a mail server delivery guru - but I know that dns / reverse dns records must match SMTP server info dns info.

Some mail servers look for a banner to be configured properly.
I do not know how to properly set up the banner - but that will not stop all mail flow - only a small percentage - so your main problem is your dns records.
If you have access to your E-Mail server and it is an Exchange server 2007 -
I have read that the banner must be configured by the Exchange Management Shell (not console) - I cannot find that reference at this time - Perhaps I am wrong.
One of the links below tells you how to configure your banner - via Exchange Management Console if using Exchange 2003. If using other than Exchange
I do not have any information on how to configure anything.

You may can do this if you have access to your dns records in your registrars web interface, but if your E-Mail server is in your location - connected to your Internet Service Provider - you will need to have them (your ISP) to change your dns records - to match your legalpundits domain.

mxtoolbox tools - report:
Not an open relay.
0 seconds - Good on Connection time
0.047 seconds - Good on Transaction time
Reverse DNS FAILED! This is a problem.
Warning - Reverse DNS does not match SMTP Banner

http://www.mxtoolbox.com
You can contact support at mxtoolbox.com - they seem pretty helpful.

http://www.smartertools.com/forums/t/26024.aspx

http://www.amset.info/exchange/dnsconfig.asp

Best of Luck