How to create a new Postfix user account

If you wonder how to create a new Postfix user account, this is how you do it, just type in:
useradd -s /sbin/nologin username
Then follow by setting up a user password:
passwd username

Then create Home Directory with appropriate permissions:
mkdir /home/username/Maildir
chown username:username /home/username/Maildir
chmod -R 700 /home/username/Maildir

And finally restart Postifx:
/etc/init.d/postfix restart
and other services you’re using, example:
/etc/init.d/dovecot restart
/etc/init.d/saslauthd restart