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1
SPF records: A null DNS lookup was found for include
https://community.cloudflare.com/t/spf-records-a-null-dns-lookup-was-found-for-include/652430
2
SPF Null Value: Is It The Problem Or The Solution? - PowerDMARC
https://powerdmarc.com/spf-null-value/
3
Why do I see a "null DNS lookup" when I use a certain DNS scanner?
https://support.valimail.com/en/articles/9143114-why-do-i-see-a-null-dns-lookup-when-i-use-a-certain-dns-scanner
4
SPF Authentication Failed - How to Fix It? - Smartlead
https://www.smartlead.ai/blog/how-to-fix-spf-authentication-failed-error
5
A Null DNS Lookup Was Found For Include
https://sendbridge.com/tutorials/a-null-dns-lookup-was-found-for-include
6
Advanced Troubleshooting: SPF, DKIM, DMARC & DNS Propagation
https://helpcenter.smartlead.ai/en/articles/400-advanced-troubleshooting-spf-dkim-dmarc-and-dns-propagation
7
Smartlead Help : r/coldemail - Reddit
https://www.reddit.com/r/coldemail/comments/1m0i8h5/smartlead_help/
8
SPF Record Null Value - MxToolbox
https://mxtoolbox.com/problem/spf/spf-record-null-value%3Fs0%3DPROBLEMDETAILS_BLACKLIST_AB%26abt_id%3DAB-552%26abt_var%3DVariation
9
DNS Records - Troubleshooting SPF - Critical Impact
https://support.criticalimpact.com/hc/en-us/articles/8780189931661-DNS-Records-Troubleshooting-SPF
10
A null DNS lookup was found for include - Cloudflare Community
https://community.cloudflare.com/t/a-null-dns-lookup-was-found-for-include/523198