How to get original recipient from Postfix when using LMTP?

[Tanstaafl]

On Wed May 22 2019 13:34:42 GMT-0400 (Eastern Standard Time), MRob via
dovecot <dovecot at dovecot.org> wrote:
> On 2019-05-22 08:18, Tuomo Soini via dovecot wrote:
>> On Tue, 21 May 2019 18:24:46 +0000
>> MRob via dovecot <dovecot at dovecot.org> wrote:
>>
>>> Many people prefer to use LMTP for delivery from postfix for better
>>> efficiency but X-Original-to header support still missing after many
>>> years. One affect of this is need to set
>>> sieve_vacation_dont_check_recipient = yes which violate Sieve
>>> standard and cause auto-replyies sent to messages that should not
>>> happen. Or abandon LMTP. or abandon postfix??
>>>
>>> So while feature request is stalled are there any realistic
>>> workarounds?
>>
>> add to smtp_recipient_restrictions, before permitting email but after
>> all checks:
>>
>>     check_recipient_access pcre:/etc/postfix/recipient_access.pcre
>>
>> # cat /etc/postfix/recipient_access.pcre
>> /(.+)/ prepend X-Original-To: $1
> 
> Warning, do not do this unless you don't mind recipients of 
> multi-recipient emails to see a list of everyone who got a copy of the 
> email message, including BCC recipients. This isn't a good solution if 
> you want to respect user privacy.

Bummer, I was actually glad to see a way to get the x-original-to when
using LMTP.

Guess I'm stuck with the LDA until this gets implemented.