greylist

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Noun

greylist (plural greylists)

1. (legal) A list, resembling a blacklist, for less serious offences.
2. (internet) 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.

Verb

greylist (greylists, present participle greylisting; past and past participle greylisted)

1. (transitive) To place on a greylist.

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