Hi,
I'm trying to find out which is the correct way to configure alias
domains on postfix.
For example, I have 3 different domains (example.com, example.info,
example.net), and when I send an e-mail to a user on any of the three
domains it's always sent to "u...@example.com".
In other words, I never need to configure mailboxes or users on any of
the other two domains ("alias domains", as I call them). It's
sufficient to have the user configured on the main domain.
I've seen the following resources on that topic:
- https://workaround.org/ispmail/wheezy/virtual-domains
- http://www.postfix.org/VIRTUAL_README.html#forwarding
Unfortunately, those resources only describe the following types of forwarding:
- j...@example.info --> jane@somewhere-else
- @example.info --> jim@somewhere-else (catch-all feature)
What I would need is a correctly working solution of:
- @example.info --> @somewhere-else, or
- <any>@example.info --> <any>@somewhere-else
Doing some tests with some test configuration
sending/forwarding/retrieving seems to work (e-mails sent to one of
the alias domains arrive at the main domain), but if there is a
non-existing mailbox on the main domain and the e-mail is sent to the
corresponding user at one of the alias domains no e-mail bounces back
from the main domain saying that the mail could not be delivered.
How can I make postfix bounce e-mails back when there is no user for
it on the main domain? Is there a specific, standard way of doing
alias domains on postfix? (It should be some kind of "standard
use-case" after all, shouldn't it? Google Mail let you define alias
domains on Google Apps, and that simply works.)
Thanks in advance for any hints,
Peter
