J?r?me BECOT via Postfix-users:
> If I get it, the virtual alias change to another domain then the
> smtp_generic_maps change back to the original domain ? It works fine.
>
> I played with it and I'd like something generic because we don't have
> knowledge of all remaining adresses on the old mail.
>
> I can set the smtp_generic like this:
>
> @oldmx.abc.com @abc.com
>
> But I can't do the same for the virtual alias (it changes email in all
> my local users to oldmx.abc.com and sends directly to the old server).
> Is there a solution to map any unknown user without providing emails in
> virtual aliases ?
You will have to enumerate (all the the oldmx recipients), or (all
the abc recipients that should not be forwarded to oldmx).
1 - Enumerate virtual aliases for 'oldmx' users, as in my first response.
2 - All of the following: a) Enumerate all the abc users with 1:1
virtual aliases (u...@abc.com -> u...@abd.com), b) use one wildcard
virtual alias (@abc.com -> @oldmx.abc.com) that forwards everything
else to oldmx.abc.com, c) use smtp_generic_maps as in my first
response, and d) use reject_unverified_recipient to avoid accepting
non-existent recipients.
Wietse
> Thank you
>
> Le 07/06/2023 ? 17:00, Wietse Venema via Postfix-users a ?crit?:
> > J?r?me BECOT via Postfix-users:
> >> Hello,
> >>
> >> I know that this may have been asked a few times, but I need some help:
> >>
> >> I manage a server for the domain abc.org. The mx points to my server and
> >> it is configured to:
> >>
> >> - lookup virtual mailboxes and virtual aliases from LDAP
> >> - send mails to dovecot
> >>
> >> It works, but I'd like to handle recipients that does not exist in LDAP
> >> (nor in Dovecot) and forward them to an older server, that used to own
> >> the domain:
> >>
> >> j...@abc.com > exists in LDAP > delivered to Dovecot
> >> jdaniel > does not exists in LDAP > forwarded to oldmx.abc.com
> >>
> >> I have unsuccessfully tried to:
> >>
> >> - add a hashed tranport map in virtual_transport_maps
> >> - add it in transport_maps
> > That would fail with "User Unkonwn" errors.
> >
> > You need a virtual alias:
> >
> > /etc/postfix/main.cf:
> > virtual_alias_maps = hash:/etc/postfix/virtual_alias
> >
> > /etc/postfix/virtual_alias
> > jdan...@abc.com usern...@oldmx.abc.com
> >
> > (or LDAP equivalent).
> >
> > DO NOT add oldmx.abc.com to main.cf:virtual_alias_domains.
> >
> > In the case that oldmx.abc.com rejects mail for
> > usern...@oldmx.abc.com, you also need:
> >
> > /etc/postfix/main.cf:
> > smtp_generic_maps = hash:/etc/postfix/smtp_generic
> >
> > /etc/postfix/smtp_generic:
> > usern...@oldmx.abc.com usern...@abc.com
> >
> > (or LDAP equivalent).
> >
> > Wietse
> > _______________________________________________
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> --
> *J?r?me BECOT*<https://www.deveryware.com>
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