You guys know that, even if your mail was contaminated with AIDS, which could only happen if someone with AIDS bled on it or masturbated on it or something, then the only way you could contract it is by rubbing it on an open wound or eating the envelope, right? AIDS only spreads through sexual contact or blood. There are trace amounts of AIDS in saliva, but the only way to get it from that is to drink several gallons of AIDS infected saliva in one sitting.