Jauder Ho wrote,
H> I keep getting messages like this and invariably they are spam. Does
H> anyone have an idea on how to reject such mail?
Invariably? I post most of my submissions here Cc: the list with no To: line.
Era Eriksson recommended,
E> You could even go as far as to look for ! ^TO -- I believe this will
E> at least match the current flurry of To-less AOL spam
and Liviu Daia concurred,
D> Depending on your sendmail configuration, To:-less messages may have
D> Apparently-To: headers, and ^TO will match them. Personally, I'm using
D> :0:
D> * ! ^(To|Cc):
D> spam
Something with neither To: nor Cc: is certainly suspicious, but if there is
a Cc:, and it points to you or to a mailing list that you belong to, the
absence of To: is no indicator of spam. Take Era's or Liviu's advice and
filter on ! ^TO or ! ^(To|Cc): instead of just ! ^To: