Gioele Pannetto via Postfix-users:
> On 11/03/25 15:14, Bill Cole via Postfix-users wrote:
>
> >> Sorry but in the first email you said that "automatic BCC recipients
> >> are subject to virtual_alias_maps expansions"
> > Meaning: the OUTPUT of a BCC lookup is put through a virtual alias
> > expansion.
> >
> >> and now you are saying that alias expansion is not used in BCC lookup.
> > No, he said the alias expansion happens AFTER BCC lookup. The output
> > of a virtual alias expansion of a BCC lookup is NOT used for another
> > BCC lookup
>
> Okay thanks, It's starting to make sense.
>
> I think that the only way of achieving what I'm trying to do it is to
> BCC every email to another Postfix instance and then expanding again the
> aliases there.
>
> Thanks for your time.
There is no need for an extra Postfix instance.
You want, but this cannot work:
recipient_bcc_maps
# BCC expansion for the alias-expanded recipient
user2@domain2.example user3@domain3.example
virtual_alias_maps:
# alias the recipient
user1@domain1.example user2@domain2.example
# Add user2's BCC addreses
user2@domain2.example user3@domain3.example, user4@domain4.example
Instead do this:
virtual_alias_maps:
# alias the recipient
user1@domain1.example user2@domain2.example
# Add user2's BCC addreses
user2@domain2.example user2@domain2.example, user3@domain3.example,
user4@domain4.example
This will alias user1@domain1.example to user2@domain2.example,
AND ALSO BCC all mail for user2@domain2.example to user3@domain3.example
and user4@domain4.example.
The trick is in the second rule: to add multiple BCC addresses for
user2@domain2.example, list user2@domain2.example on both sides of
the virtual_alias_maps rule.
Wietse
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