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RFC 2821: To accomodate greylisting, which is an anti-spam procedure...

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Comment by Jim Guiltinan
Submitted on 3/29/2007
Related RFC: RFC 2821
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To accomodate greylisting, which is an anti-spam procedure for requiring outgoing mailservers to send a message a second time after a waiting period that is commonly set to five minutes, before accepting delivery, and email sent from clustered mailservers that use multiple IP addresses, I would like an additional protocol to this RFC Spec for clustered mailservers to be required to send messages that are to be resent (retried) for any reason to be sent from the same IP address that the original delivery attempt was made from.