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MTA-STS HTTPS Policy Certificate

What you see when your domain has this problem
MTA-STS HTTPS Policy Certificate is Invalid or Expired Details area Ignore
Add mta-sts monitor for mail.bemkawire.com.tr

More Information About Mta-Sts Https Policy Certificate

This error indicates (per RFC 8461 Section 3.3) that the subdomain setup for the MTA-STS policy (mta-sts.domain.com) DOES NOT have a valid certificate or the certificate has expired. Without a valid, non-expired certificate (issued by a trusted Certificate Authority), the MTA-STS policy is invalid. 

How can I resolve this issue?

  • Purchase or renew an X.509 certificate for the HTTPS server hosting the subdomain
  • Certificate MUST be from a trusted Certificate Authority

MxToolbox Delivery Center

This is one problem. Inbox providers check every layer.

Gmail, Yahoo! and Outlook check your email at several layers before it reaches the inbox. Delivery Center monitors and manages every one of them, so you find and fix problems before they cost you delivery.

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