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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 01, 2018

M3AAWG Compromised User ID Best Practices, Version 1.0.1

Updated in March 2018, this document addresses problems associated with compromised user accounts. It discusses mitigation techniques and methods of identifying compromised accounts, including recommendations to ensure the long-term security of accounts to prevent “re-compromise.”

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February 28, 2018

M3AAWG Help – I’m On A Blocklist, version 1.0.1

Nearly all email systems, including those of Email Sender Providers and network operators, at some point have delivery issues because their sending IPs or domains are on a blocklist. This document shares established procedures defining how to triage and respond to a blocklisting to assist in a timely and effective resolution.  Version 1.0.1 was updated in February 2018.

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January 31, 2018

M3AAWG Recommendations for Preserving Investments in New Generic Top-Level Domains (gTLDs)

Over a thousand new generic Top-Level Domains (gTLDs) have been, or are in, the process of being created under ICANN’s new gTLD program.  This paper is written for current Registry operators and for companies interested in applying for new gTLDs, and outlines the risks and some relatively simple recommendations that can help correct these problems.

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December 30, 2017

M3AAWG Recommendations for Senders Handling of Complaints

Email abuse rates can significantly affect a sender’s reputation and, consequently, its ability to deliver customers’ emails to the inbox. This paper explains some of the common processes senders can use to effectively manage and monitor email complaints and to help their customers, who are the list owners, develop healthy email practices that generate better results.
of email lists.

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November 03, 2017

M3AAWG Recommendation on Web Form Signup Attacks

Many list web forms provoke an email confirmation to the subscriber's email address provided in the form but malicious entities are now using this feature to do bulk form submissions with forged addresses that flood the subscriber’s inbox. M3AAWG members collaborated across the industry to propose a header as an initial step that hosting and sending companies can implement to help protect against these attacks. The header allows receivers to identify floods of mail coming from sign-up forms that are bombarding victim mailboxes.

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