Howto: Postfix aliases setup email account

See here how to setup an email account with Postfix, the popular email server.

Edit /etc/postfix/virtual.cf:

vim /etc/postfix/virtual.cf

Add this line:

user@example.com localusername

Update the Postfix lookup table:

postmap /etc/postfix/virtual.cf

Edit /etc/aliases:

vim /etc/aliases

Add this line:

localusername: someother@othersite.com

Finally, rebuild the aliases database:

newaliases