TLS-RPT
TLS-RPT provides aggregate feedback on TLS connections between mail servers. Reports help investigate transport failures, not prove that mail was read.
TLS-RPT refers to SMTP TLS Reporting. Sending mail systems can use it to report statistics and error information about TLS connections to the receiving domain. The reports concern transport, such as certificate problems or an MTA-STS policy issue.
Link a finding to the right period
In the fictional design, the team examines report B-655. It relates the reporting period, affected domain and reported failure type to a planned mail server change. A certificate error is initially a technical finding; its cause still needs checking. The report alone does not prove an attack.
The specified reports contain aggregate connection counts and can provide details about failure types. Failure groups can overlap. Do not treat their unchecked sum as a count of affected emails.
Separate the report from delivery status
A successful TLS connection confirms neither inbox placement nor reading of a message. Missing reports do not establish fault-free operation either. Determine which systems report and who handles the analysis. TLS-RPT reports observations; repairing a faulty server or policy configuration remains a separate operational task.
Sources
Related terms
- MTA-STSMTA-STS publishes requirements for TLS connections to a mail domain. Mail servers, certificates and the policy actually applied belong together.
- Email deliverabilityDeliverability is about whether expected email actually reaches the inbox. Check sending status, authentication and actual receipt separately.
- DMARC aggregate reportA DMARC aggregate report summarises a reporting mail system’s domain checks over a period. It helps examine sending sources and misconfigurations.
- Return-PathReturn-Path records the SMTP reverse path in a header. It explains the technical route for error reports, not a person’s identity.
- Envelope-FromEnvelope-From identifies the SMTP sender for transport and error feedback. It must be distinguished from the visible sender address.
- DMARC policyA DMARC policy describes the requested handling of failed domain checks. It repairs neither sending sources nor their alignment.
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