Unexpected behavior with sieve_vacation_to_header_ignore_envelope = yes

[Stephan Bosch]

Op 27/02/2019 om 13:30 schreef Matthias Petermann via dovecot:
> Hello,
>
> we face an issue with the vacation extension of pigeonhole. Our 
> upstream mail server (from which we pull our E-Mails with POP3) uses 
> SPF and performs a SRS re-write of the Return Path. Once the mail is 
> processed via our local postfix, it is delivered via dovecot deliver 
> (using the lda). When the recipient has a vacation rule enabled in 
> sieve, the out-of-office note cannot be sent, as pigeonhole tries to 
> use the Return-Path (which is not accepted as sender by the mail server).
>
> We are using the following dovecot / pigeonhole versions:
>
> dovecot-2.3.2.1
> dovecot-pigeonhole-0.5.2
>
> As of my understanding, the problem was addressed in pigeonhole 
> version v0.4.21 by introducing the 
> sieve_vacation_to_header_ignore_envelope setting. Anyway - even when 
> this is set to "yes" pigeonhole still uses the Return-Path instead of 
> the "From:" header which I had expected:
>
> Feb 27 13:22:26 mail dovecot: 
> lda(customer)<48383><3o+yOQGBdlz/vAAAZU03Dg>: Error: sieve: 
> msgid=<e081d2ba-21d5-c32b-3750-69fe0c8a76d2 at petermann-it.de>: failed 
> to send vacation response to 
> SRS0=gwGXg6ad=RC=petermann-it.de=matthias at example.com: <Sendmail 
> program returned error> (temporary error)
>
> Are my expectations wrong or did I miss some precondition?

That setting is only about the composition of the "To:" header for the 
outgoing vacation message (it's in the name). It has nothing to do with 
the RCPT TO envelope address used for that message. Why exactly do the 
mail servers reject the vacation message (I am not too familiar with SRS).

Regards,

Stephan.


>
> Best regards,
> Matthias
>
> 1) This is the email which I use to test (I replaced the actual domain 
> with example.com):
>
> ------>8------------------------------------------------------------------------------ 
>
> Return-Path: <SRS0=gwGXg6ad=RC=petermann-it.de=matthias at example.com>
> Delivered-To: customer[[@example.com]]
> To: Customer <customer at example.com>
> From: Matthias Petermann <matthias at petermann-it.de>
> Subject: Test
> Message-ID: <e081d2ba-21d5-c32b-3750-69fe0c8a76d2 at petermann-it.de>
> Date: Wed, 27 Feb 2019 05:21:45 +0100
> User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101
>  Thunderbird/60.5.1
>
> Test message
> ------8<------------------------------------------------------------------------------ 
>
>
> 2) The related excerpt of the configuration:
>
> ------>8------------------------------------------------------------------------------ 
>
> mail /usr/local/etc/dovecot/conf.d >doveconf | grep -A 10 -B 10 
> to_header_ignore_envelope
>   result_failure = continue
>   result_internalfail = continue
>   result_success = return-ok
>   skip = never
>   username_filter =
> }
> plugin {
>   acl = vfile
>   acl_shared_dict = file:/var/lib/dovecot/shared-mailboxes
>   sieve = file:/srv/vmail/%u/sieve;active=/srv/vmail/%u/active.sieve
>   sieve_vacation_to_header_ignore_envelope = yes
> }
> pop3_client_workarounds =
> pop3_delete_type = default
> pop3_deleted_flag =
> pop3_enable_last = no
> pop3_fast_size_lookups = no
> pop3_lock_session = no
> pop3_logout_format = top=%t/%p, retr=%r/%b, del=%d/%m, size=%s
> pop3_no_flag_updates = no
> pop3_reuse_xuidl = no
> ------8<------------------------------------------------------------------------------ 
>
>