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