Because it is evil to do so. xml-dev has it right IMHO.
see http://www.unicom.com/pw/reply-to-harmful.html
If mailing list software changes the reply-to address you get the following
results:
- mail intended for an individual often gets sent to the whole list
- you can't reply to the author easily
- (worse still) if a subscriber to the list has a broken mail system,
you can get into infinite loops when mail bounces get sent back to the
list.
I've learnt all three the hard way. In the case of the infinite loops, a
mailing list I maintained brought down a system with thousands of users.
The only disadvantage of *not* changing the reply-to is that replies to all
go to both the sender and the list, so out of politeness you edit the to
field before sending.
-- James Tauber / jtauber@jtauber.com http://www.jtauber.com/ Lecturer and Associate Researcher Electronic Commerce Network ( http://www.xmlinfo.com/ Curtin Business School ( http://www.xmlsoftware.com/ Perth, Western Australia ( http://www.schema.net/