Are MTA-STS and TLS reporting ready for review?

Map transport-security DNS, policy hosting, and TLS-RPT gaps into an owner-ready fix plan.

01$0Free scan

Check the public sender-auth records mailbox providers expect.

02$0Shareable action plan

Keep one URL with evidence, owner steps, and decisions.

03$49$49 fix plan

Add human review, provider context, and verification steps.

Optional. Most first scans can run with just the domain.

Checks Gmail, Yahoo, and Microsoft sender requirementsPublic DNS onlyNo mailbox login needed

Example result72/100Needs attention

Review DMARC policy strength before a high-volume send.

Public DNS evidence: DMARC/SPF/DKIM status and caveats are visible before you pay.
Owner-ready next step: The audit adds provider context and a verification checklist.

Get the exact fix plan for your domain.$49 readiness audit: prioritized owner actions, DNS evidence, and verification checks.

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Sender readiness cockpitExample action plan

Public DNS workspace

Overall sender readiness

72/100

Needs attention

Sample output: one warning and one fail mean this domain is not campaign-ready yet.

DMARCPass

SPFPass

DKIMPass

MXPass

BIMIWarning

MTA-STSFail

Fix workspace preview

The scan becomes a focused work surface: evidence, owner action, verification, and the paid context a public lookup cannot infer.

HighDMARC

Review DMARC policy strength before a high-volume send.

Evidence: Evidence: a monitoring-only policy can satisfy visibility needs, but enforcement requires aligned legitimate senders.
Verify after change: Re-scan _dmarc after DNS propagation and confirm aligned SPF or DKIM senders before enforcement.
Paid audit adds: Policy sequence, starter record review, alignment questions, and enforcement caveats.

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What MTA-STS readiness means

MTA-STS helps a domain ask supporting mail servers to use valid TLS when delivering inbound mail. SenderReady checks public readiness signals and explains how MTA-STS relates to TLS reporting.

Official references

Google email sender guidelines Yahoo Sender Hub best practices Microsoft Outlook sender requirements

What this checker reviews

MTA-STS uses a DNS policy record at _mta-sts.yourdomain.com and a policy file served from https://mta-sts.yourdomain.com/.well-known/mta-sts.txt. A complete review should confirm both the DNS record and the hosted policy.

TLS-RPT is the companion reporting signal for transport security. A _smtp._tls.yourdomain.com TXT record can ask receivers to send reports about TLS delivery issues so teams can monitor MTA-STS impact.

This is transport-security hardening, not an inbox placement lever. MTA-STS can help protect mail delivery paths, but it does not replace SPF, DKIM, DMARC, reputation management, consent practices, or complaint monitoring.

MTA-STS FAQ

Does MTA-STS affect deliverability?

MTA-STS is about encrypted transport between mail servers. It may improve security posture, but it does not guarantee inbox placement or override sender reputation signals.

Why pair MTA-STS with TLS-RPT?

TLS-RPT gives you reports about TLS negotiation and policy problems. Those reports help you spot delivery-path issues before enforcing or tightening an MTA-STS policy.

What should I check before enforcing a policy?

Confirm your MX hosts, TLS certificates, HTTPS policy file, and DNS records are correct. Move carefully with your mail administrator so legitimate inbound mail is not disrupted.