# yum install *sendmail* *mutt* *dovecot*

 

Note: mutt is just a mail browser.
# cd   /etc/mail
# cp   sendmail.mc  sendmail.mc.original
# cp   sendmail.cf  sendmail.cf.original

 

# vim   sendmail.cf
(replace Addr=127.0.0.1 with your system IP address)

 

# vim /etc/mail/aliases (for redirecting)
user1@domain.com     user2@domain.com

 

# vim /etc/mail/access (for security purpose)
user1@domain.com       Reject

 

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

 

# service  sendmail  start

 

# vim  /etc/dovecot.conf
protocols  =  imap  imaps  pop3  pop3s
mail_location  = maildir:~/mbox
mail_location = mbox:~/mail:INBOX=/var/mail/%u
pop3_uidl_format  =  %08Xu%08Xv
imap_client_workarounds = outlook-idle  delay-newmail  netscape-eoh
pop3_client_workarounds = outlook-no-nuls    oe-ns-eoh

 

On client computer:
# mail   -v   abc@domain.com
Or Use Outlook Express, Evolution, Squirrelmail etc. 

 

Note: don’t forget to define DNS address in tcp/ip properties of the LAN CARD on the clients computer.