From:, Mail, and sendmail

[dave at uwvax.ARPA]

You will notice (if you have source) that 4.2bsd Mail will take
the 'Reply-to:' field instead of 'From:' if the former exists.

A side point.  If the non-BSD site messes up the 'From:' line,
shouldn't the site in question be notified of their actions?

-- 
Dave Cohrs @ wisconsin
...!{allegra,heurikon,ihnp4,seismo,ucbvax,uwm-evax}!uwvax!dave
dave at wisc-rsch.arpa