G.Khan no, it is a 3rd party add-on..sorry, don't remember where I saw it. It does not effect outgoing mail, it effects filtering of incoming mail.
X-QUORK yes, only 2002. I don't know what you downloaded, but you should have read it before you started downloading

....most probably the 22nd revision of the 38th addendum to the 10th issue of the update notification tool....
G.Khan Lord Lucan is completely right. Send mail to yourself and see how it arrives...than report back if there are further problems.