Name challenge for anti-spamware

I notice I got another emailed press release from the new (she took over last year) press officer at the Netherlands tourist office in London - Christa Enter.

Her (or my?) email agent displays her name in the order Surname, Firstname so emails from her always appear in my intray as from " Enter Christa".

I keep wondering why my anti spam software doesn't reject her emails out of hand as porno spam!