Upgrade for Live Support

All of our paid plans come with access to our highly experienced technical support team.

  • Contact us via Email, Phone, or Ticket
  • Detailed Explanation of Your Lookup Results
  • Guidance to Help Resolve Your Problems
  • RFC Compliance Best Practices
  • Blacklist Delisting Support

Let our experts help you resolve your mta-sts issue!

Get Mta-Sts Support

MTA-STS Policy Syntax Check

What you see when your domain has this problem
MTA-STS Policy Syntax Invalid Details area Ignore
Add smtp monitor for 206.248.136.91

More Information About Mta-Sts Policy Syntax Check

This error indicates that there is a syntax problem with your MTA-STS Policy .TXT file hosted on your https://mta-sts.domain.com/.well-known/mta-sts.txt URL. Possible errors include:

  • No .TXT file found at "/.well-known/mta-sts.txt"
  • Required key-value pairs are missing (V, Mode, and Max_age are all required keys)
  • Key is present, but the value is missing or incorrect (typo or wrong value)

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

  Learn More

burritos@banana-pancakes.com braunstrowman@banana-pancakes.com finnbalor@banana-pancakes.com ricflair@banana-pancakes.com randysavage@banana-pancakes.com