The simplest method to host an additional domain is to add the
domain name to the domains listed in the Postfix
mydestination
configuration parameter, and to add the user names to the UNIX
password file.
This approach makes no distinction between canonical and hosted
domains. Each username can receive mail in every domain.
In the examples we will use "example.com" as the domain that is
being hosted on the local Postfix machine.
/etc/postfix/main.cf:
mydestination = $
myhostname localhost.$
mydomain ... example.com
The limitations of this approach are:
- A total lack of separation: mail for [email protected] is
delivered to the same UNIX system account as mail for [email protected].
- With users in the UNIX password file, administration of large
numbers of users becomes inconvenient.
The examples that follow provide solutions for both limitations.
