Wietse:
> Indeed, a FILTER action takes precedence over other Postfix routing
> mechansms.
>
> You'd use a rule like:
>
> Key Value
> === ===================
> pattern FILTER smtp:nexthop
>
> Where 'nexthop' equals the sender_dependent_relayhost_maps info for
> the auto-responding user. The tricky part is the 'pattern'.
spi via Postfix-users:
> Thanks for the support - then I wasn't completely wrong with FILTER. I
> couldn't get my fingers around a pattern to check for the existence of a
> particular header and an empty MAIL FROM. Any advice on postfix examples
> for further reading?
header_checks does not match multiple headers. As I wrote
finding a pattern that matches only Sieve generated mail can be
difficult.
Would it be possible to intercept a Sieve autoreply at the point
where Dovecot submits it to Postfix? Then one could prepend a unique
header there.
Otherwise use a real sender address.
Wietse
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