if they aren't "threatening" you...and you have TOLD them very clearly "do not contact me again"...this person has emailed me several times at my personal and work address (I haven't replied in months) and mailed a card to my home. I set up an automated response to his email account that said "This account has been closed" so he then sent me the same email FROM A DIFFERENT EMAIL ADDRESS, I guess to test if the email was truly closed. It's someone I was once good friends with and worked with who has become kind of unbalanced I guess...delusional even, paranoid, angry....which is why he no longer works there.