# nolisting

> English word · Noun

## Definitions
1. A technique for blocking spam (junk e-mail) by configuring a non-existent server as the primary MX record, so that initial contact always fails. A legitimate sender is likely to try the next server, which should succeed.

## Etymology
From no + list + -ing.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/nolisting