Re: mailx in pipeline mode: add fields to the EMail header?

Take a look at sendmail. If you have flexibility in what command you
use and the syntax it might work. Though I don't think you can control
where the added header ends up.

sendmail -f fropm-id jack@example.com
X-test: testing
Subject: test

hello

<EOF>


On Tue, Jan 03, 2023 at 08:33:22AM +0100, Harald Dunkel wrote:
>Hi folks,
>
>is there some way for OpenBSD's mailx (reading an EMail to send from
>stdin) to add fields to the EMail header, e.g.
>
> Auto-Submitted: auto-generated
>
>for generated EMails, according to the recommendation in RFC 3834?
>Or maybe
>
> Precedence: bulk
>
>Maybe some custom fields like
>
> X-monitoring-severity: disaster
>?
>
>This could help to avoid a lot of unnecessary vacation responses,
>support automatic filtering, etc.
>
>The mailx command line could be
>
> echo hello | \
> mailx -s hello -a "Auto-Submitted: auto-generated" jack@example.com
>
>I thought about making "Auto-Submitted: auto-generated" the default
>for reading an EMail from stdin (if its not a tty), but this might
>break existing code.
>
>
>Regards
>
>Harri
>