On Mon, 17 Oct 2016 14:45:11 +0100 RW <rwmailli...@googlemail.com> wrote:
> On Mon, 17 Oct 2016 15:20:27 +0200 > Ralph Seichter wrote: > > From: "John Doe <j...@doe.org>" <j...@thedoefamily.net> > > is perfectly legitimate. > but an unusual and rather silly thing to do. As I mentioned, Yahoo Groups did something like this last time I checked. They did it in order not to break DMARC, but still make the original sender address visible. > Most of what SpamAssassin targets is RFC compliant. It would be > perfectly legitimate to score bogus addresses in the display name if > it proved useful. Yes, and spammers would move on to something like: From: =?UTF-8?Q?John=20Doe=20=3Cjohn=E2=80=8B=40=E2=80=8Bdoe.org=3E?= <j...@thedoefamily.net> To answer the obvious question, (0xE2 0x80 0x8B) is UTF-8 for a zero-width space, meaning the mail reader would display an apparent email address but no sane parser would extract an email address. Making a parser that could cope with all the tricks in the Unicode toolbox would be very hard. Regards, Dianne.