From: Wietse Venema (wietseporcupine.org)
Date: Mon Apr 02 2007 - 13:26:10 CDT

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David Hoekman:
> I need Postfix to relay mail generated by legacy software (i.e.
> inflexible & hard to change) which sends a 'Date' header that
> lacks timezone information, e.g. this:
> Date: Mon, 1 Apr 2007 09:15:00
>
> instead of this:
> Date: Mon, 1 Apr 2007 09:15:00 -0800 (PDT)
>
> The problem with this is that in the absence of a specific timezone,
> mail clients typically show this as having been sent from GMT,
> which can make the chronology of mail exchanges hard to follow.
>
> If no 'Date' header were present, I know that Postfix would add
> a correct one, but how can I rewrite an existing one? Or is it
> possible to delete the one supplied?

You need to somehow delete the Date: in mail from this app.

Possibilities:

- Use a perl script as proxy (like http://bent.latency.net/smtpprox/)
between the application and Postfix,

- Patch the executable file and change Date into Dxyz, then use
Postfix header_checks to remove it.

- Jump a lot of hoops with alternate cleanup servers or special
FILTER actions that I won't even attempt to describe.

        Wietse

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