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parsedmarc

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A screenshot of DMARC summary charts in Kibana

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, Dmarcian, OnDMARC, ProofPoint Email Fraud Defense.

Features

  • Parses draft and 1.0 standard aggregate/rua reports
  • Parses forensic/failure/ruf reports
  • Can parse reports from an inbox over IMAP
  • 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 and/or Splunk, for use with premade dashboards
  • Optionally send reports to Apache Kafka

Resources

DMARC guides

SPF and DMARC record validation

If you are looking for SPF and DMARC record validation and parsing, check out the sister project, checkdmarc.

Lookalike domains

DMARC protects against domain spoofing, not lookalike domains. for open source lookalike domain monitoring, check out DomainAware.

CLI help

usage: parsedmarc [-h] [--strip-attachment-payloads] [-o OUTPUT]
                  [-n NAMESERVERS [NAMESERVERS ...]] [-t TIMEOUT] [-H HOST]
                  [-u USER] [-p PASSWORD] [--imap-port IMAP_PORT]
                  [--imap-no-ssl] [-r REPORTS_FOLDER] [-a ARCHIVE_FOLDER] [-d]
                  [-E [ELASTICSEARCH_HOST [ELASTICSEARCH_HOST ...]]]
                  [--elasticsearch-index-prefix ELASTICSEARCH_INDEX_PREFIX]
                  [--elasticsearch-index-suffix ELASTICSEARCH_INDEX_SUFFIX]
                  [--hec HEC] [--hec-token HEC_TOKEN] [--hec-index HEC_INDEX]
                  [--hec-skip-certificate-verification]
                  [-K [KAFKA_HOSTS [KAFKA_HOSTS ...]]]
                  [--kafka-aggregate-topic KAFKA_AGGREGATE_TOPIC]
                  [--kafka-forensic_topic KAFKA_FORENSIC_TOPIC]
                  [--save-aggregate] [--save-forensic] [-O OUTGOING_HOST]
                  [-U OUTGOING_USER] [-P OUTGOING_PASSWORD]
                  [--outgoing-port OUTGOING_PORT]
                  [--outgoing-ssl OUTGOING_SSL] [-F OUTGOING_FROM]
                  [-T OUTGOING_TO [OUTGOING_TO ...]] [-S OUTGOING_SUBJECT]
                  [-A OUTGOING_ATTACHMENT] [-M OUTGOING_MESSAGE] [-w] [--test]
                  [-s] [--debug] [-v]
                  [file_path [file_path ...]]

Parses DMARC reports

positional arguments:
  file_path             one or more paths to aggregate or forensic report
                        files or emails

optional arguments:
  -h, --help            show this help message and exit
  --strip-attachment-payloads
                        Remove attachment payloads from forensic report output
  -o OUTPUT, --output OUTPUT
                        Write output files to the given directory
  -n NAMESERVERS [NAMESERVERS ...], --nameservers NAMESERVERS [NAMESERVERS ...]
                        nameservers to query (Default is Cloudflare's
                        nameservers)
  -t TIMEOUT, --timeout TIMEOUT
                        number of seconds to wait for an answer from DNS
                        (Default: 2.0)
  -H HOST, --host HOST  IMAP hostname or IP address
  -u USER, --user USER  IMAP user
  -p PASSWORD, --password PASSWORD
                        IMAP password
  --imap-port IMAP_PORT
                        IMAP port
  --imap-no-ssl         Do not use SSL/TLS when connecting to IMAP
  -r REPORTS_FOLDER, --reports-folder REPORTS_FOLDER
                        The IMAP folder containing the reports (Default:
                        INBOX)
  -a ARCHIVE_FOLDER, --archive-folder ARCHIVE_FOLDER
                        Specifies the IMAP folder to move messages to after
                        processing them (Default: Archive)
  -d, --delete          Delete the reports after processing them
  -E [ELASTICSEARCH_HOST [ELASTICSEARCH_HOST ...]], --elasticsearch-host [ELASTICSEARCH_HOST [ELASTICSEARCH_HOST ...]]
                        One or more Elasticsearch hostnames or URLs to use
                        (e.g. localhost:9200)
  --elasticsearch-index-prefix ELASTICSEARCH_INDEX_PREFIX
                        Prefix to add in front of the dmarc_aggregate and
                        dmarc_forensic Elasticsearch index names, joined by _
  --elasticsearch-index-suffix ELASTICSEARCH_INDEX_SUFFIX
                        Append this suffix to the dmarc_aggregate and
                        dmarc_forensic Elasticsearch index names, joined by _
  --hec HEC             URL to a Splunk HTTP Event Collector (HEC)
  --hec-token HEC_TOKEN
                        The authorization token for a Splunk HTTP Event
                        Collector (HEC)
  --hec-index HEC_INDEX
                        The index to use when sending events to the Splunk
                        HTTP Event Collector (HEC)
  --hec-skip-certificate-verification
                        Skip certificate verification for Splunk HEC
  -K [KAFKA_HOSTS [KAFKA_HOSTS ...]], --kafka-hosts [KAFKA_HOSTS [KAFKA_HOSTS ...]]
                        A list of one or more Kafka hostnames or URLs
  --kafka-aggregate-topic KAFKA_AGGREGATE_TOPIC
                        The Kafka topic to publish aggregate reports to
                        (Default: dmarc_aggregate)
  --kafka-forensic_topic KAFKA_FORENSIC_TOPIC
                        The Kafka topic to publish forensic reports to
                        (Default: dmarc_forensic)
  --save-aggregate      Save aggregate reports to search indexes
  --save-forensic       Save forensic reports to search indexes
  -O OUTGOING_HOST, --outgoing-host OUTGOING_HOST
                        Email the results using this host
  -U OUTGOING_USER, --outgoing-user OUTGOING_USER
                        Email the results using this user
  -P OUTGOING_PASSWORD, --outgoing-password OUTGOING_PASSWORD
                        Email the results using this password
  --outgoing-port OUTGOING_PORT
                        Email the results using this port
  --outgoing-ssl OUTGOING_SSL
                        Use SSL/TLS instead of STARTTLS (more secure, and
                        required by some providers, like Gmail)
  -F OUTGOING_FROM, --outgoing-from OUTGOING_FROM
                        Email the results using this from address
  -T OUTGOING_TO [OUTGOING_TO ...], --outgoing-to OUTGOING_TO [OUTGOING_TO ...]
                        Email the results to these addresses
  -S OUTGOING_SUBJECT, --outgoing-subject OUTGOING_SUBJECT
                        Email the results using this subject
  -A OUTGOING_ATTACHMENT, --outgoing-attachment OUTGOING_ATTACHMENT
                        Email the results using this filename
  -M OUTGOING_MESSAGE, --outgoing-message OUTGOING_MESSAGE
                        Email the results using this message
  -w, --watch           Use an IMAP IDLE connection to process reports as they
                        arrive in the inbox
  --test                Do not move or delete IMAP messages
  -s, --silent          Only print errors and warnings
  --debug               Print debugging information
  -v, --version         show program's version number and exit

Sample aggregate report output

Here are the results from parsing the example report from the dmarc.org wiki. It's actually an older draft of the the 1.0 report schema standardized in RFC 7480 Appendix C. This draft schema is still in wide use.

parsedmarc produces consistent, normalized output, regardless of the report schema.

JSON

{
  "xml_schema": "draft",
  "report_metadata": {
    "org_name": "acme.com",
    "org_email": "noreply-dmarc-support@acme.com",
    "org_extra_contact_info": "http://acme.com/dmarc/support",
    "report_id": "9391651994964116463",
    "begin_date": "2012-04-27 20:00:00",
    "end_date": "2012-04-28 19:59:59",
    "errors": []
  },
  "policy_published": {
    "domain": "example.com",
    "adkim": "r",
    "aspf": "r",
    "p": "none",
    "sp": "none",
    "pct": "100",
    "fo": "0"
  },
  "records": [
    {
      "source": {
        "ip_address": "72.150.241.94",
        "country": "US",
        "reverse_dns": "adsl-72-150-241-94.shv.bellsouth.net",
        "base_domain": "bellsouth.net"
      },
      "count": 2,
      "alignment": {
        "spf": true,
        "dkim": false,
        "dmarc": true
      },
      "policy_evaluated": {
        "disposition": "none",
        "dkim": "fail",
        "spf": "pass",
        "policy_override_reasons": []
      },
      "identifiers": {
        "header_from": "example.com",
        "envelope_from": "example.com",
        "envelope_to": null
      },
      "auth_results": {
        "dkim": [
          {
            "domain": "example.com",
            "selector": "none",
            "result": "fail"
          }
        ],
        "spf": [
          {
            "domain": "example.com",
            "scope": "mfrom",
            "result": "pass"
          }
        ]
      }
    }
  ]
}

CSV

xml_schema,org_name,org_email,org_extra_contact_info,report_id,begin_date,end_date,errors,domain,adkim,aspf,p,sp,pct,fo,source_ip_address,source_country,source_reverse_dns,source_base_domain,count,disposition,dkim_alignment,spf_alignment,policy_override_reasons,policy_override_comments,envelope_from,header_from,envelope_to,dkim_domains,dkim_selectors,dkim_results,spf_domains,spf_scopes,spf_results
draft,acme.com,noreply-dmarc-support@acme.com,http://acme.com/dmarc/support,9391651994964116463,2012-04-27 20:00:00,2012-04-28 19:59:59,,example.com,r,r,none,none,100,0,72.150.241.94,US,adsl-72-150-241-94.shv.bellsouth.net,bellsouth.net,2,none,fail,pass,,,example.com,example.com,,example.com,none,fail,example.com,mfrom,pass

Sample forensic report output

Thanks to Github user xennn for the anonymized forensic report email sample.

JSON

 {
  "feedback_type": "auth-failure",
  "user_agent": "Lua/1.0",
  "version": "1.0",
  "original_mail_from": "sharepoint@domain.de",
  "original_rcpt_to": "peter.pan@domain.de",
  "arrival_date": "Mon, 01 Oct 2018 11:20:27 +0200",
  "message_id": "<38.E7.30937.BD6E1BB5@ mailrelay.de>",
  "authentication_results": "dmarc=fail (p=none, dis=none) header.from=domain.de",
  "delivery_result": "smg-policy-action",
  "auth_failure": [
    "dmarc"
  ],
  "reported_domain": "domain.de",
  "arrival_date_utc": "2018-10-01 09:20:27",
  "source": {
    "ip_address": "10.10.10.10",
    "country": null,
    "reverse_dns": null,
    "base_domain": null
  },
  "authentication_mechanisms": [],
  "original_envelope_id": null,
  "dkim_domain": null,
  "sample_headers_only": false,
  "sample": "Received: from Servernameone.domain.local (Servernameone.domain.local [10.10.10.10])\n\tby  mailrelay.de (mail.DOMAIN.de) with SMTP id 38.E7.30937.BD6E1BB5; Mon,  1 Oct 2018 11:20:27 +0200 (CEST)\nDate: 01 Oct 2018 11:20:27 +0200\nMessage-ID: <38.E7.30937.BD6E1BB5@ mailrelay.de>\nTo: <peter.pan@domain.de>\nfrom: \"=?utf-8?B?SW50ZXJha3RpdmUgV2V0dGJld2VyYmVyLcOcYmVyc2ljaHQ=?=\" <sharepoint@domain.de>\nSubject: Subject\nMIME-Version: 1.0\nX-Mailer: Microsoft SharePoint Foundation 2010\nContent-Type: text/html; charset=utf-8\nContent-Transfer-Encoding: quoted-printable\n\n<html><head><base href=3D'\nwettbewerb' /></head><body><!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 3.2//EN\"=\n><HTML><HEAD><META NAME=3D\"Generator\" CONTENT=3D\"MS Exchange Server version=\n 08.01.0240.003\"></html>\n",
  "parsed_sample": {
    "from": {
      "display_name": "Interaktive Wettbewerber-Übersicht",
      "address": "sharepoint@domain.de",
      "local": "sharepoint",
      "domain": "domain.de"
    },
    "to_domains": [
      "domain.de"
    ],
    "to": [
      {
        "display_name": null,
        "address": "peter.pan@domain.de",
        "local": "peter.pan",
        "domain": "domain.de"
      }
    ],
    "subject": "Subject",
    "timezone": "+2",
    "mime-version": "1.0",
    "date": "2018-10-01 09:20:27",
    "content-type": "text/html; charset=utf-8",
    "x-mailer": "Microsoft SharePoint Foundation 2010",
    "body": "<html><head><base href='\nwettbewerb' /></head><body><!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 3.2//EN\"><HTML><HEAD><META NAME=\"Generator\" CONTENT=\"MS Exchange Server version 08.01.0240.003\"></html>",
    "received": [
      {
        "from": "Servernameone.domain.local Servernameone.domain.local 10.10.10.10",
        "by": "mailrelay.de mail.DOMAIN.de",
        "with": "SMTP id 38.E7.30937.BD6E1BB5",
        "date": "Mon, 1 Oct 2018 11:20:27 +0200 CEST",
        "hop": 1,
        "date_utc": "2018-10-01 09:20:27",
        "delay": 0
      }
    ],
    "content-transfer-encoding": "quoted-printable",
    "message-id": "<38.E7.30937.BD6E1BB5@ mailrelay.de>",
    "has_defects": false,
    "headers": {
      "Received": "from Servernameone.domain.local (Servernameone.domain.local [10.10.10.10])\n\tby  mailrelay.de (mail.DOMAIN.de) with SMTP id 38.E7.30937.BD6E1BB5; Mon,  1 Oct 2018 11:20:27 +0200 (CEST)",
      "Date": "01 Oct 2018 11:20:27 +0200",
      "Message-ID": "<38.E7.30937.BD6E1BB5@ mailrelay.de>",
      "To": "<peter.pan@domain.de>",
      "from": "\"Interaktive Wettbewerber-Übersicht\" <sharepoint@domain.de>",
      "Subject": "Subject",
      "MIME-Version": "1.0",
      "X-Mailer": "Microsoft SharePoint Foundation 2010",
      "Content-Type": "text/html; charset=utf-8",
      "Content-Transfer-Encoding": "quoted-printable"
    },
    "reply_to": [],
    "cc": [],
    "bcc": [],
    "attachments": [],
    "filename_safe_subject": "Subject"
  }
}

CSV

feedback_type,user_agent,version,original_envelope_id,original_mail_from,original_rcpt_to,arrival_date,arrival_date_utc,subject,message_id,authentication_results,dkim_domain,source_ip_address,source_country,source_reverse_dns,source_base_domain,delivery_result,auth_failure,reported_domain,authentication_mechanisms,sample_headers_only
auth-failure,Lua/1.0,1.0,,sharepoint@domain.de,peter.pan@domain.de,"Mon, 01 Oct 2018 11:20:27 +0200",2018-10-01 09:20:27,Subject,<38.E7.30937.BD6E1BB5@ mailrelay.de>,"dmarc=fail (p=none, dis=none) header.from=domain.de",,10.10.10.10,,,,smg-policy-action,dmarc,domain.de,,False

Documentation

https://domainaware.github.io/parsedmarc

Bug reports

Please report bugs on the GitHub issue tracker

https://github.com/domainaware/parsedmarc/issues

About

A Python package and CLI for parsing aggregate and forensic DMARC reports

domainaware.github.io/parsedmarc/

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Apache-2.0 license
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