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MTA-TLS

What is MTA-STS?

MTA-STS is a setting that helps make sure your email is delivered over secure, encrypted connections so it cannot be intercepted on the way. This article explains what it does, why it matters and how it fits alongside SPF, DKIM and DMARC.

18 Jun 2026 60

Hosted MTA-STS: switch it on and enforce

Hosted MTA-STS lets DMARCER create and serve your MTA-STS policy and look after its TLS certificate, so sending mail servers always use an encrypted connection to your domain. You just publish a couple of DNS records, then move from testing into full enforcement when you are ready.

29 Jun 2026 41