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Python module which extracts all IP addresses from an SPF record and outputs them in CIDR format
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README.rst

SPF2IP

This is a Python module which iterates through a domain's SPF record data, and lists all of the IP addresses found within the SPF record itself, all "included" SPF records, and IP addresses resolved from the "A/AAAA" records found in the SPF records and any "MX" records.

This module supports returning both IPv4 and IPv6 addresses.

The output of this module can be used to configure a firewall dynamically when SMTP traffic should only be received from trusted sources such as in the event that you want to get email from your cloud provider to your on-premises mail servers without exposing the SMTP ports to the world.

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INSTALLATION

Install from pip:

pip install SPF2IP

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COMMON USAGE

Command line:

SPF2IP [-h] --domain DOMAIN [--ip-version {4,6}]

Module:

from SPF2IP import SPF2IP
lookup = SPF2IP('example.org')

lookup.IPArray('4')   # Specify the IP version which you would like listed
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