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Sean WhalenandClaude Fable 5
cd864f4cfc
Each entry in the existing nameservers option now selects its own transport (#880): an IP address means plain DNS on port 53 exactly as before, an https:// URL means DoH, and tls://ip[:port][#hostname] means DoT, with the optional #hostname naming the TLS certificate identity (systemd-resolved syntax). Forms can be mixed in one list, and no new configuration option is involved. DoH queries go through a shared per-process httpx client passed to dns.query.https as session=, which is what makes them honor HTTP_PROXY/ HTTPS_PROXY/NO_PROXY and SSL_CERT_FILE — the motivating proxy-only corporate network case. dnspython's stock DoH path cannot do this: it builds its httpx client around a custom transport, and httpx only reads proxy environment variables when no transport is supplied (allow_env_proxies = trust_env and transport is None). The client is rebuilt when the PID changes so fork-based worker pools never share a parent's sockets. The dnspython requirement becomes dnspython[doh]>=2.7.0 — the extra supplies the httpx/h2 floors DoH needs, and 2.7.0 is the floor verified against the dns.nameserver and dns.query.https(session=...) APIs used. The startup DNS pre-flight check now exercises whichever transports are configured, so a malformed DoH/DoT entry raises ConfigurationError before any mailbox work begins. Malformed tls:// entries — including the plausible slash-for-# typo tls://9.9.9.9/dns.quad9.net, which would otherwise silently drop the certificate identity — are rejected at configuration time naming the entry. Verified live: DoH A/PTR queries against Cloudflare and DoT against Quad9 (tls://9.9.9.9#dns.quad9.net), plus a full CLI run over a sample report with encrypted-DNS-only nameservers. Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
parsedmarc
parsedmarc is a Python module and CLI utility for parsing DMARC
reports. When used with Elasticsearch and Kibana (or Splunk), it works
as a self-hosted open-source alternative to commercial DMARC report
processing services such as Agari Brand Protection, Dmarcian, OnDMARC,
ProofPoint Email Fraud Defense, and Valimail.
Note
Domain-based Message Authentication, Reporting, and Conformance (DMARC) is an email authentication protocol.
Sponsors
This project is maintained by one developer. Please consider sponsoring my work if you or your organization benefit from it.
Features
- Parses aggregate/rua DMARC reports: the legacy draft and 1.0 schemas (RFC 7489) and the new RFC 9990 schema for the final DMARC standard (RFC 9989)
- Parses failure/ruf DMARC reports (RFC 6591 and RFC 9991; formerly called forensic reports)
- Parses reports from SMTP TLS Reporting (TLS-RPT, RFC 8460)
- Can parse reports from an inbox over IMAP, Microsoft Graph, or Gmail API
- Transparently handles gzip or zip compressed reports
- Consistent data structures
- Simple JSON and/or CSV output
- Optionally email the results
- Optionally send the results to Elasticsearch, OpenSearch, Splunk, or PostgreSQL, for use with premade dashboards
- Optionally send the results to Apache Kafka, Amazon S3, Azure Log Analytics (Microsoft Sentinel), a Graylog (GELF) endpoint, a syslog server, or an HTTP webhook
Python Compatibility
This project supports the following Python versions, which are either actively maintained or are the default versions for RHEL or Debian.
| Version | Supported | Reason |
|---|---|---|
| < 3.6 | ❌ | End of Life (EOL) |
| 3.6 | ❌ | Used in RHEL 8, but not supported by project dependencies |
| 3.7 | ❌ | End of Life (EOL) |
| 3.8 | ❌ | End of Life (EOL) |
| 3.9 | ❌ | Used in Debian 11 and RHEL 9, but not supported by project dependencies |
| 3.10 | ✅ | Actively maintained |
| 3.11 | ✅ | Actively maintained; supported until June 2028 (Debian 12) |
| 3.12 | ✅ | Actively maintained; supported until May 2035 (RHEL 10) |
| 3.13 | ✅ | Actively maintained; supported until June 2030 (Debian 13) |
| 3.14 | ✅ | Supported (requires imapclient>=3.1.0) |