On Thu, Aug 31, 2023 at 07:53:03AM +0200, Jaroslaw Rafa via Postfix-users wrote:

> Did you also add the entry for "domain2.tld" itself (without "@" at the
> beginning) to virtual_alias_maps, so that Postfix knows that it should
> handle mail for this domain?

That's a deprecated backward's compatibility approach, that only works
when `virtual_alias_domains` is not set explicitly, and defaults to
$virtual_alias_maps.  Instead update `virtual_alias_domains`.  See
the docs.

> In my case, I have a catch-all virtual domain that is configured in
> virtual_alias_maps as follows:
> 
> example.org anything
> @example.org username

As already explained, catch-alls are a bad idea, requiring probe-based
recipient verification.  Best avoided.  Instead give each user an
explicit list of addresses in any appropriate domains.  Some day, some
user will need to not receive mail for one of the domains, and the
catchall will bite.  Take the high road.

-- 
    Viktor.

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