Navigating Google and Yahoo’s New DMARC Requirements: A Guide to Secure Email Delivery

[Published on 06-February-2024] In the ever-evolving landscape of digital communication, ensuring the security and authenticity of emails has become paramount for businesses and individual users alike. With the recent updates to DMARC (Domain-based Message Authentication, Reporting, and Conformance) requirements by major email service providers such as Google and Yahoo, effective starting February 2024, it’s crucial for domain owners to take proactive steps in configuring their email systems. Failure to comply can lead to email deliverability issues, where emails could be marked as spam or not delivered at all. In this blog post, we’ll guide you through the essentials of setting up DMARC to meet these new requirements and remind you that if you’re unsure about how to proceed, our team is here to assist you.

Understanding SPF, DKIM and DMARC

Before we delve into the details of configuring DMARC, let’s clarify SPF, DKIM, and DMARC.

  • SPF (Sender Policy Framework): Imagine you have a list of your friends who are allowed to send letters from your house. SPF is like that list, but for email. It tells the internet which email servers are allowed to send emails for your domain (like If an email comes from a server not on the list, the recipient’s server can treat it as suspicious.
  • DKIM (DomainKeys Identified Mail): This is like a secret handshake or a special sticker that you put on your letters. When you send an email, it gets a unique digital signature (the sticker). The receiving server checks this signature to make sure the email really came from you and that it hasn’t been changed on the way.
  • DMARC (Domain-based Message Authentication, Reporting & Conformance): This is like a set of rules or instructions you give to the post office. It tells them what to do if they receive a letter that doesn’t have the right sticker (DKIM) or isn’t sent by a friend from your list (SPF). You can tell them to throw the letter away, just mark it as suspicious, or deliver it normally, but also tell you about it. DMARC also includes a way for the post office to report back to you about all the letters they received and what they did with them.

Configure DMARC

Now that you have some understanding of the relationship between SPF, DKIM, and DMARC, let’s get into the details of configuring DMARC.

Step 1: Review Your SPF and DKIM Records: Before implementing DMARC, ensure that your SPF and DKIM records are correctly set up. SPF allows you to specify which mail servers are permitted to send emails on behalf of your domain, while DKIM provides an encryption key and digital signature that verifies an email message has not been tampered with.

  • SPF Setup: Ensure your domain’s DNS records include an SPF record that lists all the mail servers authorized to send emails on your behalf.
  • DKIM Setup: Ensure DKIM is enabled and properly configured by your email service provider. This involves adding a DKIM record to your domain’s DNS settings.

Step 2: Create Your DMARC Policy: Once SPF and DKIM are in place, you can proceed to set up a DMARC policy by adding a DMARC record to your DNS. This record tells receiving email servers how to enforce the SPF and DKIM policies and where to send reports about email delivery issues.

A basic DMARC policy record looks like this:

v=DMARC1; p=none;;;

  • v=DMARC1 specifies the DMARC version.
  • p=none sets the policy to monitoring mode, meaning it won’t affect your email delivery yet but will collect and send reports. You can change this to quarantine or reject once you’re confident in your setup.
  • specifies where aggregate reports should be sent.
  • specifies where forensic reports should be sent.

Step 3: Monitor and Analyze Reports: After implementing DMARC, you’ll begin receiving reports on your email delivery. These reports provide insights into any issues and help you fine-tune your SPF, DKIM, and DMARC settings. Monitoring these reports is crucial for identifying and addressing deliverability issues early on.

Step 4: Adjust Your DMARC Policy as Needed: Based on the reports, you may need to adjust your DMARC policy. It’s advisable to start with a less strict policy (p=none) and gradually move to a stricter policy (p=quarantine or p=reject) as you verify that legitimate emails are correctly authenticated and delivered.


Setting up DMARC can be technical and sometimes challenging, especially for those unfamiliar with DNS and email authentication practices. If you’re unsure about how to proceed with setting up DMARC to comply with Google and Yahoo’s new requirements, don’t hesitate to reach out to us. Our team can guide you through the process or handle the setup on your behalf for a small fee, ensuring your email communication remains secure, compliant, and effective.

In conclusion, as Google and Yahoo tighten their DMARC requirements, it’s imperative for domain owners to ensure their email systems are correctly configured. By following the steps outlined in this guide and seeking professional assistance when needed, you can safeguard your email domain against misuse, enhance your email deliverability, and maintain the trust of your recipients.