Postfix email forward

On an Ubuntu Server, i done following to setup email forwarding.

Install postfix

apt -y install postfix

Edit /etc/postfix/main.cf, add following

vi /etc/postfix/main.cf

Add

virtual_mailbox_domains = YOUR-DOMAIN_HERE.com
virtual_mailbox_base = /var/mail/vhosts
virtual_mailbox_maps = hash:/etc/postfix/vmailbox
virtual_minimum_uid = 100
virtual_uid_maps = static:5000
virtual_gid_maps = static:5000
virtual_alias_maps = hash:/etc/postfix/virtual

Create Virtual mailbox

vi /etc/postfix/vmailbox

Add

user1@YOUR-DOMAIN_HERE.com    YOUR-DOMAIN_HERE.com/user1

Create alias file, used for mail forwarding

vi /etc/postfix/virtual

Add

admin@YOUR-DOMAIN_HERE.com [email protected]

Wth above configuration, mail coming to admin@YOUR-DOMAIN_HERE.com will get forwarded to [email protected]. Email coming to user1@YOUR-DOMAIN_HERE.com get delivered to local mailbox folder.

Now run following commands to make hashmap

postmap /etc/postfix/vmailbox
postmap /etc/postfix/virtual

Restart postfix

systemctl restart postfix