Hi

On Mon, Aug 23, 2021 at 08:31:39AM +0200, [email protected] wrote:
> recently we have noticed, that our postfix add a lowercase ‚d‘ when he
> append value missing Headers,  concrete i mean to the mail by the Message-Id
> value. Is there a simple and less error way to change this behavior? So that
> our mails comply with the rfc.

Could you please show an example of what you mean?  I presume you mean
that Postfix adds the header as "Message-Id" instead of the "official"
version "Message-ID"?  As headers are case insensitive, there is no
problem.

This might be the code from cleanup:
| cleanup_out_format(state, REC_TYPE_NORM, "%sMessage-Id: <%s>",

Regards,
Bastian

-- 
Youth doesn't excuse everything.
                -- Dr. Janice Lester (in Kirk's body), "Turnabout Intruder",
                   stardate 5928.5.

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