Hosted MTA-STS
Enforce secure inbound email with hosted MTA-STS.
Protect email delivered to your domains from connection downgrade and mail-server impersonation attacks with MTA-STS.
DMARCwise handles policy hosting, HTTPS, certificates, and policy rollouts.
Policy rollout
Move from testing to enforcement safely.
New policies begin in testing mode. Pair MTA-STS with SMTP TLS reporting to see real delivery failures and confirm your MX servers are ready before enforcing the policy.
Explore SMTP TLS reporting- Choose testing, enforce, or none mode.
- Set the policy cache duration.
- Add MX servers for planned provider migrations.
- Review every revision in policy history.
Managed hosting with just two DNS records.
Delegate the MTA-STS discovery record and policy host to DMARCwise with CNAME records. Manage the policy from the dashboard while we serve it over HTTPS and automatically renew its certificate.
Policy and HTTPS hosting
DMARCwise publishes the policy and discovery record in the correct order, serves the policy over HTTPS, and manages its TLS certificate.
Automatic MX synchronization
Detected mail server changes produce an updated policy and discovery ID automatically, and you receive a notification showing what changed.
Continuous health checks
DNS records and certificates stay monitored and you're notified if a previously healthy configuration needs attention.
Update and retire policies safely.
MTA-STS policies are cached by sending servers, so update order and retirement timing matter. DMARCwise publishes each change in the correct sequence and uses a managed retirement window when you disable the service.
Try DMARCwise
Take control of email authentication and delivery.
- Understand what your DMARC, SPF, DKIM, and SMTP TLS data means.
- Fix issues and enforce policies without disrupting legitimate senders.
- Continue monitoring as your domains and sending infrastructure change.
Free plan and 14-day trial available.
Have questions? Contact us or browse the documentation.