sieve vacation alias handling problem

[Stephan Bosch]

Op 3/2/2018 om 3:35 PM schreef Karol Augustin:
> Hi,
>
> I am using Dovecot LDA as LMTP renders envelope extension unusable.
>
> The problem I have noticed is that when user has multiple aliases sieve
> responds to all of them, not only to :addresses specified.
>
> From testing it seems that :addresses only adds addresses to the list of
> "known" emails to check against. It is not limiting it.
>
> As I understand, sieve should check if To: header is consistent with
> addresses known to be users. But how Dovecot knows about aliases
> assigned to the user?
>
> From my testing if header To: address is consistent with envelope To:
> address the reply is fired. I have sieve_vacation_use_original_recipient
> left at it's default value (no), so that shouldn't be the case. Now if
> user address at example.com has alias alias at example.com specified, the
> vacation reply will be sent to email addressed to alias at example.com,
> which is weird, because this behavior should be enabled by switching
> sieve_vacation_use_original_recipient to yes.
>
> When user receives an email that was originally sent to his gmail
> account (forwarded) there is no reply. If I add gmail address to
> :addresses reply is generated as expected.
>
> So my main question is if this is expected? I would like to enable only
> delivery to primary address and to + extensions to that address by
> default.
>
> I think that it might be that Postfix is expanding aliases and passing
> the final recipient (as to=<XXX>) to dovecot. Then dovecot is using that
> address to check for explicit delivery, but something fails, as this
> address is obviously not in To: header. So it looks like orig_to has to
> be used as well which should be disabled by
> sieve_vacation_use_original_recipient?
>
>
> My address is: karol at augustin.pl, alias is: carol at augustin.pl
>
>
> Mar  2 12:37:32 mail dovecot: lda(karol at augustin.pl): sieve:
> msgid=<3ba0578a5f6b170e942b5bac1b19be36 at posteo.net>: sent vacation
> response to <sender at example.com>
> Mar  2 12:37:32 mail postfix/qmgr[4744]: 3zt82h4CG4z2xlw: from=<>,
> size=732, nrcpt=1 (queue active)
> Mar  2 12:37:32 mail dovecot: lda(karol at augustin.pl): sieve:
> msgid=<3ba0578a5f6b170e942b5bac1b19be36 at posteo.net>: stored mail into
> mailbox 'INBOX'
> Mar  2 12:37:32 mail postfix/pipe[8793]: 3zt82f3x4xz2xmw:
> to=<karol at augustin.pl>, orig_to=<carol at augustin.pl>, relay=dovecot,
> delay=2.2, delays=2.2/0/0/0.06, dsn=2.0.0, status=sent (delivered via
> dovecot service)
>
>
> Forward from from gmail:
>
> Mar  2 11:38:19 mail postfix/qmgr[4744]: 3zt6kL1yF7z2xgg:
> from=<karolaug+caf_=karol=augustin.pl at gmail.com>, size=5831, nrcpt=1
> (queue active)
> Mar  2 11:38:19 mail dovecot: lda(karol at augustin.pl): sieve:
> msgid=<e610a47934f9aabb31f833c025075cff at posteo.net>: discarding vacation
> response for implicitly delivered message; no known (envelope) recipient
> address found in message headers (recipient=<karol at augustin.pl>, and
> additional `:addresses' are specified)
> Mar  2 11:38:19 mail dovecot: lda(karol at augustin.pl): sieve:
> msgid=<e610a47934f9aabb31f833c025075cff at posteo.net>: stored mail into
> mailbox 'INBOX'
> Mar  2 11:38:19 mail postfix/pipe[5362]: 3zt6kL1yF7z2xgg:
> to=<karol at augustin.pl>, relay=dovecot, delay=1.3, delays=1.2/0/0/0.05,
> dsn=2.0.0, status=sent (delivered via dovecot service)
>
>
> from my master.cf:
> dovecot unix - n n - - pipe
>    flags=DRhu user=vmail:vmail argv=/usr/lib/dovecot/dovecot-lda -f
> ${sender} -a ${original_recipient} -d ${user}@${nexthop}

What is your configuration. Please provide output from `dovecot -n`.

Regards,

Stephan.