Did you disable enable_original_recipient and have postfix <= 3.2 ?
(I had to do this for a deduplication problem)
http://www.postfix.org/postconf.5.html#enable_original_recipient
Yassine -- admin sysweb.
Le 2/21/21 ? 10:22 AM, Yassine Chaouche a ?crit?:> Could it be postfix's cleanup / trivial-rewrite getting in
> the way and rewriting headers? ?
>
> Yassine -- admin sysweb.
>
> Le 2/18/21 ? 9:10 PM, ml at shadrinden.ru a ?crit?:
>> On Thu, 18 Feb 2021 14:57:19 -0500
>> Daryl Richards <daryl at isletech.net> wrote:
>>
>>> Do you have propagate_unmatched_extensions turned on?
>>>
>>> http://www.postfix.org/aliases.5.html shows that has to be on
>>> otherwise it could drop the +detail part...
>> On my machine it is by default set to
>>
>> propagate_unmatched_extensions = canonical, virtual
>>
>> According to man pages, the behavior of these values (canonical and
>> virtual) in this regard seems to be identical:
>>
>> "????? When a mail address localpart contains the optional
recipient
>> delimiter
>> ??????? (e.g.,? user+foo at domain),? the? lookup? order becomes:
>> user+foo at domain,
>> ??????? user at domain, user+foo, user, and @domain."
>>
>> --
>> Respectfully,
>> Denis Shadrin
>