If
header J Delivered-To =~ /.mailing list users\@spamassassin\.apache\.org$/
doesn't match this mail, but
header J Delivered-To =~ /mailing list users\@spamassassin\.apache\.org$/
does, why doesn't
header J Delivered-To =~ /^mailing list users\@spamassassin\.apache\.org$/
match? Odd, need to add a /m. Odd that the $ still matched. Must be
at the end of some internal list. P.S., this and \Q \E not being
allowed should be documented.