https://www.spamcop.net/anonsignup.shtml
I’ve been using them to report spammers (including companies who can’t be bothered to fix their mailing list unsubscription mechanisms). It works by parsing mail headers, identifying the origin of the email and submitting email abuse reports to the operators of the relays that processed the unwanted email.
Only if he uses Linux and insists on anal as a form of contraception. 😂