Industry Best Practices

• M3AAWG Documents for Senders and ESPs — Annotated Index

  What else M3AAWG publishes for senders and ESPs, plus the feedback-loop ecosystem — FBL format types and the per-provider FBL signup list.

• M3AAWG Email Authentication Recommended Best Practices (2020)

  The industry checklist for SPF, DKIM, DMARC, and ARC deployment — concrete record requirements for senders, and what intermediaries and receivers are expected to do.

• M3AAWG Sender Best Common Practices (Version 3.0)

  Industry-consensus baseline for commercial senders and ESPs — opt-in standards, unsubscribe requirements, data transparency (WHOIS, DNS/HELO, shared vs. dedicated IPs), client vetting, feedback-loop handling, and bounce/NDR processing.

• M3AAWG Sending Domains Best Common Practices

  Industry-consensus rules for choosing, segmenting, authenticating, delegating, and migrating the domains used to send bulk and transactional email.

• Word to the Wise: Email Best Practices

  Digest of the Word to the Wise "Email Best Practices" white paper (Laura Atkins, 2012) — delivery-focused best and worst practices for bulk senders.