the following things which i had done yet...
1. yum -y install postfix
2. yum -y install system-switch-mail-gnome
3. system > administration > mail transport agent switcher > postfix > ok
4. chkconfig postfix on
5. service postfix start
6. mutt > m(to createmail) > to:email@example.com > subject:test > hiiiiiiiiiii
i receiver this mail in return
Date: Wed, 14 Dec 2011 12:55:29 +0530 (IST)
omain (Mail Delivery System)
Subject: Undelivered Mail Returned to Sender
[-- Attachment #1: Notification --]
[-- Type: text/plain, Encoding: 7bit, Size: 0.4K --]
This is the mail system at host VMrhel5.localdomain.
I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.
For further assistance, please send mail to <postmaster>
If you do so, please include this problem report. You can
delete your own text from the attached returned message.
- - 2/2: Mail Delivery System Undelivered Mail Return
i have made no change in main.cf file what to do now...