[Dovecot] Dovecot LMTP does not pass envelope recipient +detail to sieve

[Charles Marcus]

On 2014-01-07 9:20 PM, Greg Rivers <gcr+dovecot at tharned.org> wrote:
> On Mon, 6 Jan 2014, I wrote:
>
>> I found this[1] thread that describes the same problem with 
>> dovecot-LDA, but the solution (add X-Original-To: header) has no 
>> effect with LMTP.
>>
>> My sendmail LMTP configuration:
>> FEATURE(`local_lmtp',`[IPC]',`FILE /var/run/dovecot/lmtp')
>>
>> Sendmail's address test indicates that sendmail is providing 
>> user+detail to LMTP (see below).  Except for this problem, dovecot, 
>> LMTP, and sieve are all working perfectly.  Is there something I'm 
>> missing, or is this a bug?
>>
>> [1] http://dovecot.org/pipermail/dovecot/2012-July/136987.htm

> It seems I was mistaken.  By tracing the LMTP session between dovecot 
> and sendmail I found that sendmail does _not_ include the +detail in 
> RCPT TO:. I also determined that dovecot LMTP will in fact extract the 
> +detail from a X-Original-To: header, but only if one defines 
> lda_original_recipient_header.
>
> So for the archives, to get sieve's "envelope :detail ..." working 
> with sendmail and dovecot LMTP, do the following:
>
> 1) Add "lda_original_recipient_header = X-Original-To" to 15-lda.conf
>
> 2) Add the following rule to sendmail.mc to add a X-Original-To: 
> header to every message:
>
> LOCAL_CONFIG
> H?${u}?X-Original-To: $u

So... this is a hack to get x-original-to header support in LMTP...

Hopefully Timo will see this and be able to fix this up so it supports 
it natively like the LDA does...

-- 

Best regards,

Charles