Engineering capabilities
- Reporting address and record configuration
- Report parsing and trend review
- Correlation with MTA-STS policy state
- Alerting on repeated negotiation failures
Security & DNS
TLS-RPT
Reporting channel that surfaces failed TLS negotiations to your inbound mail servers, so transport problems are seen rather than silently tolerated.
Security & hardening
- Early detection of interception or misconfigured senders
- Evidence trail for transport-security assurance
- Reports routed to a monitored mailbox, not a black hole
TLS reporting loop
Sending servers report failed TLS negotiations to an address you control, turning silent transport failures into visible data.
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01
Declaration
- _smtp._tls TXT record
- Reporting address
- Aggregation window
Reports arrive daily from participating senders.
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02
Collection
- Monitored mailbox
- Report parser
- Retention
Reports land somewhere a human or tool actually reviews.
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03
Analysis
- Failure types
- Sender identification
- Certificate issues
Repeated failures usually point at expiry, name mismatch or a broken relay.
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04
Action
- Certificate renewal
- MX correction
- MTA-STS policy update
Findings feed straight back into the transport-security configuration.
Frequently asked questions
Is TLS-RPT worth it without MTA-STS?
It is useful either way, but the pair belongs together: MTA-STS states the requirement and TLS-RPT tells you when senders could not meet it.
How many reports should we expect?
A handful a day for a typical domain, mostly from large providers. Volume is small enough for a dedicated mailbox.
Do reports contain message content?
No. They describe connection and certificate outcomes in aggregate, not messages.
Scope the work before you commit budget
Send the environment details and get an engineered proposal with assumptions, risks and a rollback path.