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Re: [dmarc-ietf] Why are MUAs hiding or removing the From address?

Joseph Brennan <brennan@columbia.edu> Thu, 23 July 2020 15:06 UTC

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From: Joseph Brennan <brennan@columbia.edu>
Date: Thu, 23 Jul 2020 11:05:59 -0400
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To: IETF DMARC WG <dmarc@ietf.org>
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Subject: Re: [dmarc-ietf] Why are MUAs hiding or removing the From address?
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On Thu, Jul 23, 2020 at 9:20 AM Benny Pedersen
<me=40junc.eu@dmarc.ietf.org> wrote:

> show the source on how to make this work in mimedefang, or will it
> completely fail with spampd ?

Since it is off topic, I will give a short answer. If the Header From
matches /From: anything <string@domain>, check whether domain is one
that needs the rewrite, gmail.com for example, and change the field to
be simply /From: string@domain/.

In Mimedefang, we created a per-message global hash %Header, and
parsed each field (split on :). So for example $Header{from} was the
value of the From header field. The hash was used in various rules. MD
has a built-in function to replace the content of header fields, which
I think is a milter function.


-- 
Joseph Brennan
Lead, Email and Systems Applications

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