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brew install checkdmarclocal Homebrew formula metadata
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Install checkdmarc with Homebrew
Command-line parser for SPF and DMARC DNS records. Version 5.17.3 via Homebrew; verified 2026-06-24.
install
Additional install commands
overview
Package summary
Command-line parser for SPF and DMARC DNS records
Project links
Commands and aliases
- checkdmarc
history
Project history and usage
checkdmarc is a Python module and command-line tool for validating DNS records used by email authentication, especially SPF and DMARC. Its package-manager significance comes from packaging operational email-security checks as a repeatable CLI rather than a one-off DNS debugging script.
Project history
The upstream repository was created under domainaware in December 2017, and the project metadata describes checkdmarc as a Python module and command-line parser for SPF and DMARC records. The official documentation later expanded the scope to CLI, API, and web interfaces for validating SPF, DMARC, BIMI, MX, MTA-STS, SMTP TLS reporting, SOA, DNSSEC, and nameserver data.
The changelog shows continuing maintenance through the 5.x line, including updates for newer DMARC behavior such as RFC 9989 handling and ongoing parser, DNS, TLS, and dependency fixes.
Adoption history
The package was first uploaded to PyPI as 1.3.0 in December 2017 and was still being released as 5.17.3 in June 2026. The batch package metadata also lists Homebrew distribution, making it available to macOS and Linux users who prefer system package managers over pip.
The official README advertises PyPI version and download badges and the docs link to a web application frontend, which points to usage beyond local scripting.
How it is used
Typical usage is to run the checkdmarc executable against one or more domains and inspect machine-readable JSON or CSV output. The tool is aimed at operators who need to validate SPF and DMARC records and related email-security DNS configuration.
Because it is also a Python module, the same checks can be embedded into automation or reporting pipelines instead of being used only as an interactive CLI.
Why package nerds care
checkdmarc matters to package nerds because it sits at the intersection of DNS operations, email authentication, and Python packaging. It turns a set of fiddly RFC-driven DNS checks into an installable command that can be upgraded through PyPI or Homebrew.
Its dependency and changelog history also show the maintenance burden common to security-adjacent CLIs: protocol changes, cryptography/OpenSSL dependency updates, DNS edge cases, and output stability all need to ship quickly.
Timeline
- 2017: domainaware/checkdmarc repository created and 1.3.0 uploaded to PyPI.
- 2025: Official Sphinx documentation described checkdmarc as a module, CLI, and web application for SPF and DMARC validation.
- 2026: 5.17.3 released with Python metadata and validation fixes.
Related projects
- checkdmarc-web-frontend is the related web interface linked from the official documentation.
- dnspython, SPF, DMARC, BIMI, MTA-STS, and SMTP TLS reporting are adjacent technologies that define much of the tool's job.
Sources
security posture
No protected-tool coverage found yet
No matching local secret-handling manifest was found for checkdmarc. Nucleus package metadata is still published here so future coverage has a stable package URL.
Install behavior
- No Homebrew post-install hook is recorded in formula metadata.
- Homebrew bottle metadata is available for 1 platform targets.
- Installs with 3 runtime dependencies.
Recommended review
Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.
executables
Installed executables
| Command | Kind | Exposure | Note |
|---|---|---|---|
checkdmarc | cli | global executable |
freshness
Version and freshness
These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.
page generated2026-07-08
manager version5.17.3
manager updated2026-06-24
local dataok
upstreamnot checked
latest detectednot detected
https://domainaware.github.io/checkdmarc/
- infoRelease/tag comparison is only available for GitHub repositories.https://domainaware.github.io/checkdmarc/none confidence
install metadata
Package metadata
| Package key | brew:checkdmarc |
|---|---|
| Version | 5.17.3 |
| Package manager | Homebrew |
| Package manager page | https://formulae.brew.sh/formula/checkdmarc |
| Homepage | https://domainaware.github.io/checkdmarc/ |
| Repository | https://github.com/domainaware/checkdmarc |
| Upstream docs | https://domainaware.github.io/checkdmarc |
| License | Apache-2.0 |
| Source archive | https://files.pythonhosted.org/packages/5a/4f/9824295f8a7a812c393d6f9509c74da538ae243ab4edf8e5fac64a051e3a/checkdmarc-5.17.3.tar.gz |
| Last updated | 2026-06-24T23:44:19Z |
| Pulse | updated |
| Dependencies | certifi, cryptography, python@3.14 |
| Bottle | available (on all) |
| Homebrew post-install | not defined |
| Service | none declared |
registry facts
Source database details
| Source Database | Homebrew formula API |
|---|---|
| Tap | homebrew/core |
| Full Name | checkdmarc |
| Version Scheme | 0 |
| Revision | 0 |
| Head Version | HEAD |
| Bottle Stable Root URL | https://ghcr.io/v2/homebrew/core |
| Deprecated | no |
| Disabled | no |
| Keg Only | no |
| URL Keys |
|
source trail
Generated from repository data
This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.
Combined YAML source
View the package source record on GitHub.
Used sources
- Geiger risk classifier
- Nucleus package database
- av.db category and tag curation
- cross-ecosystem install command graph
- curated package history
- package relationship graph
- package version freshness
- package-page enrichment