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Learning DNS for Developers

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amazon.com 216.73.216.59 Your IP DNS Lookup DNS Propagation Checker SPF Record Lookup A Record Lookup AAAA Record Lookup CNAME Record Lookup TXT Record Lookup MX Record Lookup

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outbound-smtp40.blacknight.com SPF record

Queried just now

No SPF record No SPF record found for outbound-smtp40.blacknight.com

check TXT records