On Thursday, March 26, 2009 5:49 PM -0400 "David F. Skoll" <dfs at roaringpenguin.com> wrote: > Not correct. RFC 2822 specifies that a message can have zero > or one Subject: header. See the table of headers/min/max in that RFC. Which can be found here: <http://tools.ietf.org/html/rfc2822#section-3.6>