Hi, as a follow up to this question -
1) in addition to sending the messages to a script, is there a way to
store the messages in a real mailstore ( Maildir ) ?
2) can I return something from the script that would cause the message
to get rejected, maybe even send a message back with an error code
virtual_transport = mailstore
mailstore unix - n n - - pipe
flags=DRXhu user=vmail argv=/path/to/script ${recipient}
On Sat, Jan 4, 2020 at 3:26 PM Stats Student
<stats.student4...@gmail.com> wrote:
>
> Thanks very much, appreciate the detailed explanation. Everything
> seems to working as advertised.
>
> On Mon, Dec 30, 2019 at 7:32 AM Wietse Venema <wie...@porcupine.org> wrote:
> >
> > Wietse Venema:
> > > Stats Student:
> > > > Hi, I would like to configure Postfix to do the following:
> > > >
> > > > 1) receive messages for users in a Postgres database and hand those
> > > > messages to an external script for processing (no traditional
> > > > mailstore). The server handles mail for only one domain.
> >
> > With a few minor refinements:
> >
> > Postfix chooses the delivery method based on the recipient domain
> > (the part on the right-hand side of the '@').
> >
> > Here, we direct mail for example.com to your message store, and we
> > make sure that all cronjob mail comes from r...@example.com,
> > w...@example.com etc.
> >
> > This uses the name 'mailstore' for all things related to your
> > database. Of course you can use a different name.
> >
> > /etc/postfix/main.cf
> > virtual_transport = mailstore
> > mailstore_destination_recipient_limit=1
> > virtual_mailbox_domains = example.com
> > virtual_mailbox_maps = hash:/etc/postfix/mailstore-users
> > myorigin = example.com
> > mydestination =
> >
> > /etc/postfix/master.cf:
> > # Requires mailstore_destination_recipient_limit=1 in main.cf.
> > mailstore unix - n n - - pipe
> > flags=DRXhu user=vmail argv=/path/to/script ${recipient}${recipient}
> >
> > /etc/postfix/mailstore-users:
> > f...@example.com whatever
> > b...@example.com whatever
> >
> > This requires that you have have a UNIX system account 'vmail'
> > (command: useradd vmail). Of course you can use a different name.
> >
> > Once you have this working, replace hash:/etc/postfix/mailstore-users
> > with a pgsql table that returns a non-emnpty string for existing
> > users, and 'not found' otherwise. See "man pgsql_table", especially
> > the section "LIST MEMBERSHIP".
> >
> > > 2) for a handful of accounts (postmaster, help, root), the messages
> > > should be forwarded to another address (different domain). Would be
> > > great for this forwarding to take place without going through the
> > > processing script in (1).
> >
> > Use virtual_alias_maps:
> >
> > /etc/postfix/main.cf:
> > virtual_alias_maps = hash:/etc/postfix/virtual
> >
> > /etc/postfix/virtual:
> > postmaster user1@example
> > root user2@example
> > help user3@example
> >
> > No need to muck with content filters.
> >
> > Wietse
