> On 1 Feb 2021, at 16:12, Viktor Dukhovni <postfix-us...@dukhovni.org> wrote:
>
> On Mon, Feb 01, 2021 at 03:43:55PM +0100, Gerben Wierda wrote:
>
>>> Yes, at the cost of a dedicated transport whose master.cf entry contains
>>> an override for smtp_generic_maps:
>>>
>>> master.cf:
>>> mycanon unix ... smtp
>>> -o smtp_generic_maps=$mycanon_generic_maps
>>>
>>> main.cf:
>>> transport_maps = inline:{ {example.com = mycanon:} }
>>> mycanon_generic_maps = inline:{ { @$myorigin = myal...@mydomain.net }
>>> }
>>
>> Sorry for my dimness (not doing this daily) but do I understand this
>> correctly as:
>>
>> - Message is deliverd to normal transport (smtp process A) first
>
> No, absent prior content_filters that apply to all messages regardless
> of recipient domain there's only one delivery, via the transport
> specified in transport_maps.
>
> Perhaps you're confusing incoming messages via smtpd(8) with
> a delivery transport. The Postfix concept of transport is
> an output-only concept. The smtpd(8) service is incoming mail.
>
>> - transport_maps in main.cf says: “when recipient is example.com
>> <http://example.com/>, use transport mycanon)
>
> That's the one and only transport.
>
>> - Message is delived to mycanon transport (smtp process B) from normal
>> transport (smtp process A)
>
> No, the queue manager routes the message directly to the
> correct transport for each batch of recipients sharing
> the same nexthop destination.
>
>> - mycanon transport replaces myorigin with the alias
>
> Correct.
As I said, I’m dim. And worried that I’l be breaking my setup. So I want to
really understand this, before I do anything.
I already have a filled transport_maps,
transport_maps = hash:/opt/local/etc/postfix/transport
it contains entries like:
wierda.net smtp:192.168.2.66:25
(wierda.net is a virtual domain hosted on this mail server).
master.cf contains the standard:
smtp unix - - y - - smtp
So I guess, I’ll have to add something to /opt/local/etc/postfix/transport
instead overruling the whole thing inline.
Summing it up:
master.cf gets:
mycanon unix - - y - - smtp
-o smtp_generic_maps=$mycanon_generic_maps
smtp unix - - y - - smtp
/opt/local/etc/postfix/transport gets an extra line:
example.com mycanon:
main.cf gets:
mycanon_generic_maps = inline:{ { @$myorigin = myal...@mydomain.net } }
Result:
qmgr (or is it trivial-rewrite that handles transport_maps in some way and
passes that on to qmgr?) uses transport_maps to pass the message to example.com
<http://example.com/> on to the 'smtp with the -o flag’ process
the 'smtp with the -o flag’ process uses the content of smtp_generic_maps to do
the sender address rewrite from <whatever> to myal...@mydomain.net
<mailto:myal...@mydomain.net>
Correct?
Yours,
G
