[Dovecot] sieve-extprograms strips Return-Path headers

[Stephan Bosch]

Hi Ben,

On 11/13/2012 3:57 PM, Ben Morrow wrote:
> The sieve-extprograms extension strips Return-Path headers before
> passing mail off to the external program. The patch to remove this
> behavious is trivial (and attached), but since it appears to be
> deliberate I felt I should investigate further.
>
> I believe this is basically a cut-and-paste error. The code to strip
> Return-Path has been there since the sieve-pipe plugin for Dovecot 1.x,
> and I believe it was copied from the equivalent code in the 'redirect'
> action for passing mail off to sendmail(8). In that case, stripping
> Return-Path is correct, since the message is being resubmitted for
> delivery (by SMTP or otherwise), and the last step of the new delivery
> will (should) add a new Return-Path header with the new envelope
> information. In the case of sieve-extprograms, though, the filtering is
> happening post-delivery, so a stripped Return-Path will never be
> replaced.

Yeah, you are right. Applied:

http://hg.rename-it.nl/pigeonhole-0.3-sieve-extprograms/rev/3bd6ed27ae26

Regards,

Stephan.