Configuring SMTP (POSTFIX)

1. #yum install postfix
2. #service postfix restart
3. #chkconfig postfix on
4. #vim /etc/postfix/main.cf
1. Line 83 --> Uncomment & put domain name
1. mydomain=example.com
2. Line 99 --> Uncomment & put domain name
1. myorigin=example.com
3. Line 113 --> Uncomment
1. inet_interfaces=all
4. Line 116 --> Comment it
1. #inet_interfaces=localhost
5. Line 164 --> Comment it
1. #mydestination=$myhostname,localhost,$mydomain,localhost
6. Line 165 --> Uncomment
1. mydestination=$myhostname,localhost.$mydomain,localhost,$mydomain
5. #service postfix restart
6. Forward the mail from hr@example.com to employee@example.com
7. #vim /etc/postfix/virtual  
1. Go to last line (shift+g) and append following:
2. hr@example.com     employee@example.com
8. Copy Line 158-159 of /etc/postfix/virtual & Paste in the end of /etc/postfix/virtual and Uncomment it
9. #vim /etc/postfix/virtual
10. #postmap /etc/postfix/main.cf
11. Create alias for hr for employee, like any mail coming to hr@example.com should be delivered to employee@example.com as well
12. #vim /etc/aliases
1. Go to last line, append following
2. hr :     employee