Thanks to Andryan, Andy, Hugo and Stuart for their replies. Andryan is correct, hinet.net is located in Taipei.  I ought to have checked this information (with eg http://www.81solutions.com/server-location.html) before I let off steam.  :( Andy, I'm a DIY operation, not a sysadmin.  FWIW, I don't run my email through Spam Assassin.  I haven't needed to do so yet.  One rule might be to delete any 'Received from' headers which contain 'dynamic' in the domain name.  I am unsure whether SpamAssassin knows how to do this. Hugo points out that the Nigerian sharks are of a different breed than the Eastern ones.  The Eastern sharks are unafraid to abuse the major banks and Fortune 500 names.  That was unseen prior to 2010. Stuart's rule to blackhole entire Class A nets based on geography is just the ticket.  There's probably a market out there for an enterprising young gun. Thanks for everyone's help! Cheers --- On Wed, 2/20/13, Andryan Gouw <andryan(a)gmail.com> wrote: From: Andryan Gouw <andryan(a)gmail.com> Subject: Re: [bitfolk] Fw: You have received a secure message from Bank Of America (fwd) To: users(a)lists.bitfolk.com Received: Wednesday, February 20, 2013, 4:24 PM Isn't hinet.net a Taiwanese ISP? Regards, Andryan -----Original Message----- From: Max B <txtmax(a)yahoo.ca> Sender: users-bounces+andryan=gmail.com(a)lists.bitfolk.com Date: Wed, 20 Feb 2013 08:06:30 To: <users(a)lists.bitfolk.com> Subject: [bitfolk] Fw: You have received a secure message from Bank Of     America (fwd) _______________________________________________ users mailing list users(a)lists.bitfolk.com https://lists.bitfolk.com/mailman/listinfo/users _______________________________________________ users mailing list users(a)lists.bitfolk.com https://lists.bitfolk.com/mailman/listinfo/users