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Sean WhalenandClaude Opus 5
9ab432e7d3
py/use-of-exit-or-quit (29 sites): replace bare `exit(...)` calls with `sys.exit(...)` in cli.py (20 sites), sortlists.py (4 sites), and find_unknown_base_reverse_dns.py (5 sites). `exit` is injected into the interactive namespace by the `site` module, so it is not guaranteed to exist under `python -S` or an embedded interpreter — the very error paths that called it would raise NameError instead of exiting cleanly. `sys.exit` is always available and was already used elsewhere in these files. sortlists.py did not import `sys`; the import was added to its existing stdlib import block. find_unknown_base_reverse_dns.py already imported `sys` (used at line 71), so only the call sites changed there. Checked tests/test_cli.py for anything patching `exit` directly — none do; the SystemExit-based assertions exercise the same behavior for either spelling, so no test changes were needed. py/multiple-definition (4 sites): removed the dead `index_date` computation in save_aggregate_report_to_elasticsearch() (elastic.py:944-947) and save_aggregate_report_to_opensearch() (opensearch.py:875-878). Both blocks derived index_date from the report-level begin_date, but the per-record loop immediately below unconditionally recomputes index_date from each record's own begin_date before the only read of the variable (the index name build near the end of the loop body). Verified by reading both functions that no code between the outer assignment and the loop's recompute reads index_date, and that the recompute is unconditional on every path that reaches the read, before deleting. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
parsedmarc
parsedmarc is a Python module and CLI utility for parsing DMARC
reports. When used with Elasticsearch and Kibana (or Splunk), or with
OpenSearch and Grafana, 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) |