On Wed, Jun 08, 2022 at 02:50:35PM +0200, Jaroslaw Rafa wrote:
> Dnia  8.06.2022 o godz. 17:34:19 an...@ursc.gov.in pisze:
> > But, header_checks allows to check the receipent address, but we
> > can only rewrite the recipient address (which does'nt meet our
> > requirement).
> > 
> > Is there any other simple way to achive the requirement.
> 
> The most "canonical" method to do such changes is via milter.
> You can create a milter that will change the Subject: header appropriately
> when it detects the old domain in the recipient address.

Correct, with the additional details that:

    - The recipient addresses in question should be *envelope*, not
      header recipients.

    - The milter should be applied only to inbound email, not
      outbound submission

-- 
    Viktor.

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