Best Practices

TLS para Correo: Recomendaciones Iniciales de M3AAWG-TLS for Mail: M3AAWG Initial Recommendations (2014)

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.”

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.

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.

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.

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.

パスワードマネージャ利用に関するM3AAWG推奨 - M3AAWG Password Managers Usage Recommendations (March 2017)

This document covers best practices on how to properly construct and maintain an SPF record, common errors and some unintended consequences.  It is targeted at those with a basic understanding of the purpose and usage of SPF.

Due to disclosed vulnerabilities associated with the use of short DKIM keys, organizations should review their DKIM email authentication implementation based on these best practices updated in July 2017.  Also see a short video on this issue at the M3AAWG YouTube Channel (www.youtube.com/maawg).

Many thousands of individual Distributed Denial-of-Service attacks take place each day. While many of these are relatively small, they are sufficient to take unprepared sites offline and threaten connectivity over large regions of the internet. It is in everyone’s interest to take all possible precautions to thwart these damaging DDoS attacks. This paper provides an overview of how this very common form of attack works, what measures can be taken to help eliminate it and pointers to some of the many technical documents that can provide more detail. Also see the video Understanding and Preventing Reflective DDoS Attacks with M3AAWG Senior Technical Advisor Dr. Richard Clayton of Cambridge University explaining reflective DDoS attacks and some of the actions the industry can take to protect against them.