Ian Duggan:
> I am trying to configure postfix to work as follows:
>
> 1) In a header_check, look for a header "X-Vmta: n" where n is some number.
> 2) Based on n, choose an outgoing smtp transport (bound to some ip)
>
> Basically I want postfix to choose the outgoing IP based on a header
> that can be placed within the message. I have configured it thusly, so
> far, but I am getting a "mail loops back to myself" error.
It means that the recipient domain resolves to a local address.
Unfortunately you ignored instructions in the mailing list welcome
message, and therefore there is no more concrete answer.
Wietse
> main.cf:
> header_checks = regexp:/etc/postfix/header_checks
>
> header_checks:
> /^X-Vmta.*1$/ FILTER vmta1:
> /^X-Vmta.*2$/ FILTER vmta2:
> /^X-Vmta.*3$/ FILTER vmta3:
> /^X-Vmta.*4$/ FILTER vmta4:
> /^X-Vmta.*5$/ FILTER vmta5:
>
> master.cf:
> vmta1 unix - - n - - smtp
> -o smtp_bind_address=x.x.x.x
> vmta2 unix - - n - - smtp
> -o smtp_bind_address=y.y.y.y
> vmta3 unix - - n - - smtp
> -o smtp_bind_address=z.z.z.z
> vmta4 unix - - n - - smtp
> -o smtp_bind_address=w.w.w.w.w
> vmta5 unix - - n - - smtp
> -o smtp_bind_address=v.v.v.v
>
> My expectation was that the header_check would "tag" the mails when
> readding them to the queue and then they would go out the specified
> transport, but maybe the loop detection in postfix is defeating me? Is
> it that the requeued emails also pass through the header_checks? I'm
> fine with stripping off the header during the check to avoid that, but
> I don't see how to FILTER and IGNORE the same line based on
> header_checks(5).
>
> Ideas?
>
> --Ian
>
>
