What is Greylisting in regards to email?

Question

What is Greylisting in regards to email?

Answer

Greylisting defends email users against spam. When enabled, the mail server will temporarily reject any email from a sender the server does not recognize. If the email is legitimate, the originating server will try again after a delay. After sufficient time has elapsed, the server will accept the email.

You may configure your servers Greylisting options in WHM at:

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