[net.mail] Standard mail header field for mecha

essick@uiuccsb.UUCP (09/21/83)

#R:ihnss:-169400:uiuccsb:9600001:000:356
uiuccsb!essick    Sep 20 08:53:00 1983

	I think that some (maybe lots) of the newer auto-answer
mail programs understand about only replying to a given address
once.  They hide a list of addresses they have sent messages to and
won't re-send to those addresses.
	This would take care of the dueling-mailer problem and 
would also avoid having to add yet another header to mail
messages.

-- Ray