Unabomber Trade Offer

Listen up, slowpoke! This here meme is based on the 'trade offer' format. It's like, someone gives you somethin', and you give them somethin' else, see? But in this case, this Unabomber dude is saying that you get mail. Now, that's where the comedy gold is, because this fella used to send bombs to people through the mail. What an idiot. You are, too, for not getting the joke!