What domain to receive mail for
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.