On Mon, 17 Oct 2016 23:20:57 +0100, David Fletcher wrote: >a) "from" a person known to me >b) "to" other people known to me Subject? Using a MUA with bogofoilter it should be easy to filter those mails without false positives. It's just a bad solution to filter hundred of mails by the MUA, this should already be done by the server.