Yahoo and Google DMARC


On October 3, 2023, Google and Yahoo announced requirements beginning February 2024 that bulk senders must have DMARC in place . 

This information outlines the changes that bulk senders need to make in order to comply with the new DMARC policies set by Google and Yahoo. Here’s a summary of the key points:

Affected Parties:

  • If you send 5,000 messages a day or more to Google or Yahoo, your email domain must have a DMARC policy in place by February 2024.
  • This includes messages sent on behalf of your organization by third-party email service providers (ESPs) that use your email domain.

Reasons for Change:

  • Google and Yahoo aim to improve email safety and security by implementing DMARC requirements.
  • DMARC helps prevent unwanted spam and identifies serious senders, improving inbox placement.

How to Prepare:

  1. Check the status of your email domains using a free domain checker to verify DMARC compliance.
  2. Use a DMARC Record Wizard to create a DMARC record if you don’t have one.
  3. Enable DMARC monitoring with a monitor-mode policy of p=none in your DNS.
  4. Ensure your messages pass DMARC alignment through DKIM or SPF.
  5. Validate that sending IPs have a PTR record (forward and reverse DNS).
  6. Avoid sending spam and comply with Yahoo and Gmail sender guidelines.

Technical Requirements:

  • Implement a DMARC policy in your DNS.
  • Use DMARC Inspector to check for a DMARC record or DMARC Record Wizard to create one.
  • Ensure messages pass DMARC alignment through DKIM or SPF.
  • Validate sending IPs have a PTR record.

Sender Guideline Enforcement Dates:

  • Yahoo will gradually enforce sender guidelines, starting in February 2024.
  • Google will implement a gradual enforcement process, with temporary errors in February 2024 and rejection of non-compliant email traffic starting in April 2024.
  • Bulk senders must implement one-click unsubscribe in all commercial, promotional messages by June 1, 2024.