A managed IT expert is helping a client with an email delivery issue.

Why Do Some of My Emails Not Get Delivered?

Fix Email Delivery Issues with These Easy Steps

Email is still one of the most powerful tools for business communication—but it’s also one of the most vulnerable. If you’ve ever wondered why some of your emails don’t reach their destination, the answer often lies in authentication, security protocols, and industry standards that email servers now enforce more strictly than ever.

The Basics: SPF, DKIM, and DMARC

Most modern email servers require at least three key authentication protocols:

  • SPF (Sender Policy Framework)
    Verifies that the sending server is authorized to send emails on behalf of your domain.
  • DKIM (DomainKeys Identified Mail)
    Adds a digital signature to your emails to prove they haven’t been tampered with.
  • DMARC (Domain-based Message Authentication, Reporting & Conformance)
    Tells receiving servers what to do if SPF or DKIM checks fail—reject, quarantine, or allow.

Without these records properly configured in your domain’s DNS, your emails may be flagged as suspicious or outright rejected.

 

What’s Coming Next: TLS-RPT, MTA-STS, and BIMI

To further enhance email security and trust, new standards are emerging—and they’re quickly becoming essential.

  • TLS-RPT (Transport Layer Security Reporting)
    Allows domain owners to receive reports about email delivery issues related to encryption. It helps identify misconfigurations or downgrade attacks.
  • MTA-STS (Mail Transfer Agent Strict Transport Security)
    Ensures that emails sent to your domain are encrypted in transit using TLS. It prevents attackers from intercepting or altering messages.
  • BIMI (Brand Indicators for Message Identification)
    Displays your brand logo next to authenticated emails in supported inboxes. It builds trust and helps users visually verify legitimate messages.

Together, these protocols improve delivery rates, prevent spoofing, and protect sensitive data from interception.

 

What You Can Do

If you’re experiencing email delivery issues, here’s a checklist to get started:

  • Set up SPF, DKIM, and DMARC records correctly.
  • Monitor DMARC reports to identify failed authentication attempts.
  • Implement TLS-RPT and MTA-STS to secure email transport.
  • Publish a BIMI record to enhance brand visibility and trust.
  • Work with your IT provider to ensure all DNS records are up-to-date and compliant.

Following these steps will help ensure your emails reach their intended recipients and maintain the trust of your audience. Partnering with a knowledgeable IT provider can make the setup process easier and give you ongoing protection against email delivery issues.

 

Final Thoughts

Email security is no longer optional—it’s a requirement. As phishing attacks and spoofing attempts grow more sophisticated, implementing these protocols is the best way to ensure your messages are delivered, trusted, and protected.

If you need help setting up these records or auditing your domain’s email security, our team at MyComputer.Pro is here to help.

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