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MTA-STS MX Host Validation

What you see when your domain has this problem
No MTA-STS Policy MX Pattern Match Details area Ignore
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More Information About Mta-Sts Mx Host Validation

This error indicates (per RFC 8461 Section 4.1) that the MX record name for the MTA-STS policy of an MX host DOES NOT match one or more of the policy's "mx" fields. If the MX record name and the "mx" fields do not match, the MTA-STS policy is invalid.

How can I resolve this issue?

  • Confirm that the MX record name and the "mx" fields match
  • If they do not match, update as needed

DMARC is the key to improving Email Deliverability!

Email is the key to your customer communication strategy. But, what is your email reputation?

Setting up and managing your DMARC configuration is the key to getting insight into your email delivery. MxToolbox is the key to understanding DMARC.

MxToolbox Delivery Center gives you:

  • Who is sending phishing email purporting to be from your domain
  • What is the reputation of your domains and delegated IPs
  • Where other senders are and What their reputations are
  • How your SPF, DKIM and DMARC setup is performing
  • What on-going maintenance you need to maintain and improve your email deliverability

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