The examples that were given above already show how to direct
mail for virtual postmaster addresses to a local postmaster. You
can use the same method to direct mail for any address to a local
or remote address.
There is one major limitation: virtual aliases and virtual
mailboxes can't directly deliver to mailing list managers such as
majordomo. The solution is to set up virtual aliases that direct
virtual addresses to the local delivery agent:
/etc/postfix/main.cf:
virtual_alias_maps = hash:/etc/postfix/virtual
/etc/postfix/virtual:
[email protected] listname-request
[email protected] listname
[email protected] owner-listname
/etc/aliases:
listname: "|/some/where/majordomo/wrapper ..."
owner-listname: ...
listname-request: ...
This example assumes that in main.cf, $
myorigin is listed under
the
mydestination parameter setting. If that is not the case,
specify an explicit domain name on the right-hand side of the
virtual alias table entries or else mail will go to the wrong
domain.
More information about the Postfix local delivery agent can be
found in the
local(8) manual page.
Why does this example use a clumsy virtual alias instead of a
more elegant transport mapping? The reason is that mail for the
virtual mailing list would be rejected with "User unknown". In
order to make the transport mapping work one would still need a
bunch of virtual alias or virtual mailbox table entries.
- In case of a
virtual alias domain, there would need to be one
identity mapping from each mailing list address to itself.
- In case of a
virtual mailbox domain, there would need to be
a dummy mailbox for each mailing list address.
