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dansimau/spfincludelookup.sh

Last active April 28, 2022 08:44
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Recursively return all SPF includes for a given domain
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spfincludelookup.sh
spfincludelookup() { for entry in $(dig +short TXT "$@" |grep --color=never spf); do [ "${entry:0:7}" == "include" -o "${entry:0:6}" == "exists" ] && echo $entry && spfincludelookup ${entry:8}; done; }
spfincludelookup "$@"
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Usage:

$ spfincludelookup google.com
include:_spf.google.com
include:_netblocks.google.com
include:_netblocks2.google.com
include:_netblocks3.google.com

Count number of records (should be less than the SPF spec limit of 10):

$ spfincludelookup google.com | wc -l
       4

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