Okay, that test came through, so your service makes a little more sense, though Seraphim is right that it's double edged.
It looked to me that unless I am a special case, it's the same 3 line phrase with a random 2 word leader grafted onto the front. Yahoo let about 10 of them through and the other 1800 landed in the Spam folder, so I'm not sure that helps your cause either, because 1800 of those already pre-sorted into the spam folder would leave the one real one in the spammer's inbox.
Okay, so I understand now, you can shut it off when you see this note.