Oh, and:

I understand why spammers use random subject line generators: to get around spam filters. Tragically, they seem to be getting better at disguising themselves, or I've accidentally put my main email address someplace that spammers can see it.

Either way, "groundless anti-Semitic" is a terrible subject line for an advertisement. Unless you're advertising discount Nazi paraphernelia, I guess. And even then your target market would probably object to the "groundless" part.

I'm sure somewhere on the 'net there's an archive of hilarious / bizarre spamject lines.