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

[Harald Dunkel]

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" j...@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