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MTA-STS HTTPS Policy Fetch

What you see when your domain has this problem
MTA-STS HTTPS Policy Fetch Failed Details area Ignore
Add smtp monitor for mail3.usenext.de

More Information About Mta-Sts Https Policy Fetch

This error (per RFC 8461 Section 3.3) indicates we were unable to find or connect to the MTA-STS Policy for the domain provided. This test attempts to establish a connection to the MTA-STS Policy. This policy is required to be hosted as a text file on a subdomain with the standard format of mta-sts.domain.com. With that format, your domain would replace the domain.com part of the subdomain.

How can I resolve this issue?

  • Set up an MTA-STS Policy by creating a subdomain in the format of mta-sts.domain.com
  • If you have already setup the page and are getting the error, verify:

1. The page uses HTTPS by default, as HTTP will be treated as invalid 

2. Verify you are not blocking traffic to that subdomain or that you have a misconfiguration on the page

 

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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.

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  • Who is sending phishing email purporting to be from your domain
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  • What on-going maintenance you need to maintain and improve your email deliverability

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