That's what I get for not setting up ReCaptcha! About forty junk emails today came in from my Contact page - found the solution in the Wiki:

http: // wiki.oscdox.com/v2.5/setting_up_security (remove the spaces to get around the redirect issue here)

I just needed to set up Recaptcha. Worked right away, problem appears to have vanished.

John :-#)#