# greylist

> English word · Noun

## Definitions
1. A list, resembling a blacklist, for less serious offences.
2. A technique for blocking spam (junk e-mail) by temporarily rejecting mail from unknown senders. A legitimate sender is likely to try sending again after a delay.

## Etymology
From grey + list.

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