How about using a pre process:
# force a value into the Reply-To field
:0 f
* ^(Cc|To)(_dot_)*all(_at_)mydomain\(_dot_)com
| formail -i "Reply-To: all(_at_)mydomain(_dot_)com"
On Tue, 16 Oct 2001, Jane S wrote:
I would like to add a reply-to line to the forwarded messages, so
that replies go to the group address (here, all(_at_)mydomain(_dot_)com).
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