I suspect the issue might be more that Mailx doesn't insist on inserting
its own From: field, whereas nmh (these days) does. If the MTA is handed
a From: field already filled in, it leaves it alone, but if there is none
(and it believes it is in mail submission mode) it will fill one in, and
can be configured with which domain to put there.
FWIW, I think it depends on which Mailx you're using; it sure seems like
Heirloom Mailx will set the From: header (because you sure need to if
you are submitting directly to an SMTP server, which Heirloom Mailx can
do).
All that said, most of my components files simply have
From: Robert Elz <kre@munnari.OZ.AU>
If people wish to do that, more power to them; I personally don't
recommend that to users because it prevents the -from switch from
working. It is also worth mentioning if nmh by default gives you the
wrong From line in a draft, you can simply change it in the draft before
you send it (or use -from).
--Ken
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