The Lupaxa Security Toolbox
Part of The Lupaxa Project
lupaxa-mx-inspector
Look up a domain's MX hosts and DMARC policy from public DNS, with an optional SMTP banner probe.
[!WARNING] Authorised use only.
--probeopens an SMTP session to the target MX hosts. Use it only on systems you are allowed to test.
Features
- Query
MXrecords (priority and host) - Query
_dmarc.<domain>for the published TXT record - Decode common DMARC tags (
p,sp,rua,ruf, alignment, and more) - Optional
--probeSMTP banner / EHLO fingerprint (no authentication, no mail) - Human-readable table output, or JSON
- Library API (
lookup_dmarc/lookup_mx/probe_smtp) and CLI (mx-inspector) - Fully typed, linted, formatted, and tested
Installation
From PyPI
pip install lupaxa-mx-inspector
From source (development mode)
pip install -e ".[dev]"
Requires Python 3.10+. Runtime dependencies: dnspython, prettytable.
Library quick start
from lupaxa.mx_inspector import lookup_dmarc, lookup_mx
policy = lookup_dmarc("example.com")
print(policy["p"], policy.get("rua"))
for host in lookup_mx("example.com"):
print(host.priority, host.exchange)
CLI quick start
mx-inspector --help
mx-inspector example.com
mx-inspector example.com example.org
mx-inspector example.com --format json
You can also run the CLI as a module:
python -m lupaxa.mx_inspector --help
python -m lupaxa.mx_inspector --version
Documentation
Online documentation:
Source repository:
Serve docs locally
From a clone of the repository:
make mkdocs-serve
Then open the local URL printed by MkDocs in your browser.
Development
Clone the repository and install with Make:
make init # first-time makefile-skills checkout
make python-install-dev # editable install with [dev]
make python-check # lint, type-check, and test
1 maintainer
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