On Wed, Apr 23, 2025 at 05:35:54PM +0300, Mike Teplynin via Postfix-users wrote:
> I want to add custom headers with "envelope from" and "envelope to" info
> received emails. To do this, I added the following lines to
> smtpd_relay_restrictions:
Why do you want to break Bcc by recording all envelope recipients in
headers? Unless you can guarantee that all messages are
single-recipient, or that Bcc is never used/intended by the user,
adding such headers is likely a mistake.
As to prepending an envelope sender header, that can be done
in `smtpd_data_restrictions`, which is evaluated just once.
--
Viktor.
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