`mydestination`

You specify what domains this machine will deliver locally, instead of forwarding to another machine. The default is to receive mail for the machine itself.

Local machine: `$myhostname, localhost.$mydomain`
Whole Domain: `$myhostname, localhost.$mydomain, $mydomain`

You can also specify the full path of a file, which will contain the names of domains that this machine will deliver mail locally for.

Example: `/etc/postfix/mydestination`

Caution: in order to avoid mail delivery loops, you must list all hostnames of the machine, including `$myhostname`, and `localhost.$mydomain`. DO NOT LIST VIRTUAL DOMAINS HERE. LIST THEM IN THE VIRTUAL FILE INSTEAD.