TLS-RPT Record Checker
TLS delivery failures happen silently — no bounce, no notification — until you have reporting configured. Enter your domain to check your TLS-RPT record and verify it's receiving failure reports.
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Understanding TLS-RPT
What is TLS-RPT?
SMTP TLS Reporting (TLS-RPT) is a standard that lets you receive reports when sending servers encounter TLS failures delivering email to your domain. It's the reporting companion to MTA-STS.
How does TLS-RPT work?
You publish a TXT record at _smtp._tls.yourdomain.com with a reporting URI. Sending servers that support TLS-RPT will send daily JSON reports about any TLS negotiation failures to that URI.
What format are TLS-RPT reports?
Reports are JSON documents sent daily, containing details about TLS connection failures: the sending server, failure type (certificate errors, policy failures), and counts. They're sent via email (mailto:) or HTTPS POST.
Do I need TLS-RPT?
If you use MTA-STS, TLS-RPT is essential — it tells you when delivery is failing due to your MTA-STS policy. Even without MTA-STS, TLS-RPT can reveal TLS issues with incoming email.
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