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TLS-RPT checker

Look up a domain's RFC 8460 TLS-RPT record over DNS-over-HTTPS and validate its version tag and reporting destinations.

Press the button to read the record
Nothing leaves this page until you do. The report reads one TXT record at smtp.tls over your chosen resolver and grades it against RFC 8460: the v=TLSRPTv1 version tag, the rua= destinations, and the one-record-per-name rule.

SMTP TLS Reporting (RFC 8460) is the visibility half of the MTA-STS picture: when a sending MTA cannot open a TLS connection to your mail hosts, this record is where it is told to send its failure summary. Without it, a broken certificate or a downgrade attack fails silently on the sending side. This tool reads the record and grades its shape; it does not check the MTA-STS policy, and it never mails or POSTs anything to the reporting addresses it finds.
OptionsCheck TLS-RPT

More network tools

- Live DNS lookup (/network/dns)
- DNS explainer (/network/dns-explain)
All network tools (/network)

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Canonical HTML: https://nutter.tools/network/tls-rpt-checker
Markdown version: https://nutter.tools/network/tls-rpt-checker.md
Plain-text version: https://nutter.tools/network/tls-rpt-checker.txt
Agent index: https://nutter.tools/llms.txt