Re: How to cleanly add forwarding header

Jeremy Harris via Exim-users <[email protected]>
Newsgroups gmane.mail.exim.user
Message-ID <[email protected]>
On 2025/08/20 4:53 AM, Ian Z via Exim-users wrote:
> Is there a cleaner way?

I don't see one.


You could play with $address_data being returned from a recipient-verify,
and add the header in ACL - but that runs into issues with multi-recipient
messages.

You could run separate transports, with/without a transport-filters - making
the decision in a router.

You could teach your users to read Received: headers, and ensure the info
in in the one you are adding (cf. $received_for).

You could add your name to https://bugs.exim.org/show_bug.cgi?id=3094 .

-- 
Cheers,
   Jeremy

PS: the IETF no longer thinks X-prefixes were a good idea.

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