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These best practices and white papers represent the cooperative efforts of M3AAWG members to provide the industry with recommendations and background information to improve messaging security and protect users. M3AAWG best practices are updated as needed and new documents are added as they become available.

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March 13, 2015

M3AAWG Best Common Practices for the Use of a Walled Garden, Version 2.0

These updated best practices outline the criteria for exit, entry, remediation and subscriber education when using a walled garden to remediate virus and bot infections in subscriber devices.

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February 17, 2015

M3AAWG Sender Best Common Practices, Version 3.0

This document gives an overview of the current best common practices for sending commercial electronic messaging, focusing on the technical and practical policy aspects of these operations. The goal of these practices is to promote and enhance the transparency of senders maintaining legitimate messaging so that both individual recipients and mailbox providers are more easily able to distinguish legitimate messaging from messaging abuse.

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December 01, 2014

TLS for Mail: M3AAWG Initial Recommendations

M3AAWG recommends three basic measures, including turning on opportunistic TLS, that messaging providers can implement relatively quickly to enhance the security and privacy of their users’ mail.

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August 23, 2012

M3AAWG Network Address Translation Best Practices: The Implications of Large Scale NAT for Security Logging

Provides guidance for system operators, network designers, security professionals and Internet Service Providers about potential issues associated with Large Scale Network Address Translation systems. 

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November 15, 2011

MAAWG Vetting Best Common Practices (BCP)

ESPs take on significant risk every time a new customer sends email. A bad client can undermine the sending reputation for the ESP’s other clients as well as inflict abuse at recipient domains. This paper reviews some vetting practices to avoid these problems.

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