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Click on the SPF cell for a domain that has volume
Click SPF Surveyor and a new window will launch with SPF record details
In the Record Analysis section, enable TMI
The reloaded view, below, of the SPF record details integrates DMARC data to show you which of your SPF record entries are in active use for your domain and in what way.
This view can help you figure out which entries are in use and which ones are no longer needed. The more unused lookups and unnecessary top-level includes in an SPF record, the bigger an attack surface you could have, so it’s critical to keep your SPF records decluttered. The SPF Surveyor data can also help you keep your SPF records tidy to stay beneath the 10 DNS lookup limit.
This feature only provides reliable feedback on domains for which you have received DMARC data in the past seven days, and in some cases, a seven-day period may not be sufficient to suggest that a particular IP range/include/etc. can be safely removed. If not entirely certain, check back on it at a later time to verify the lack of traffic.
Don’t have an account with us just yet? No problem. You can take advantage of our SPF Surveyor as part of the suite of resources we provide at no cost or commitment for people deploying DMARC.
We’re Here to Help With a team of email security experts and a mission of making email and the internet more trustworthy through domain security, dmarcian is here to help assess an organization’s domain catalog and implement and manage DMARC for the long haul.