Reply-to: Sender

[Peter Rauch]

By the way, TAXACOM is configured so that the Reply-to email header
field is set to "Sender" (i.e., to the person who originated the message),
and not to Taxacom.

Thus, all the replies you see on Taxacom are due to a conscious, explicit
effort on the part of the person replying to direct that reply to Taxacom.
(For some, it doesn't necessarily make it right, but it does indicate
the sender's intention.)
Peter