> On 28 Mar 2017, at 19:04, Markus <mar...@clardy.eu> wrote: > > Hello Alex, > > To my knowledge, you can't compare equality without a SpamAssassin plugin. > > So you can't compare the "for <m...@example.com>" with "To: > doro...@example.com". > > With a plugin, you could definitely do that, but that would cause a bit more > overhead (and some perl development). > > > How likely is it to be in legitimate mail? Highly unlikely (if ever), so > you'd be pretty safe outright rejecting mail that behaves this way, to be > honest.
On the face of it I would have thought that CC and BCC both seem like quite commonplace ways for this to come up in ham. As indeed do mailing lists, so I would be very cautious with proceeding further with this. > > - Markus Dominic
