I m a newbie to linux and postfix. After removing sendmail i have installed Postfix and other requisites as per instructions of the CentOs Site: http://wiki.centos.org/HowTos/postfix This site asked me to do following changes to the main.cf file: myhostname = mail.example.com mydomain = example.com myorigin = $mydomain inet_interfaces = all mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain mynetworks = 192.168.2.53/24, 127.0.0.0/8 (My address on lan) relay_domains = home_mailbox = Maildir/ In the /etc/aliases I added: #Person who should get root's mail root: atiq I also follwed other instructions on this centos site.After doing all they had said In the termainal i did following: #mail firstname.lastname@example.org Subject: test abc . Cc:. But this mail is not recieved by /home/atiq/Mkdir (the mailbox defined according to the centos Wiki instructions). I performed above mail operation both as a root user and then as another user but did not recieved any mail. Please tell me where I am wrong and what should I do?