greylist

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English

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Alternative forms

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Etymology

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From grey +‎ list.

Noun

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greylist (plural greylists)

  1. (law) 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

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greylist (third-person singular simple present greylists, present participle greylisting, simple past and past participle greylisted)

  1. (transitive) To place on a greylist.