Blackhole

This is a system where suspected spam is accepted by the mail server or user and silently deleted. Neither the sender or the receiver is notified.

This seems to be preferred by many companies as it means that none of their potential customers will see a rejection message, and by many users as they can not tell if a spam filter deleted the message or some other computer glitch deleted it before it got to their server. When coupled with a whitelisting system where any outgoing e-mail address is whitelisted for a response, the error rate can be almost invisible to the senders and the receivers.

As with the quarantine method, it is a more expensive method than using DNSbls.

They are also sometimes seen listed as RBL (Real-time Blackhole Lists)

---

CategorySpamCopGlossaryWikiB

---