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Learning DNS for Developers

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amazon.com 216.73.216.152 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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coppernet-net.mail.protection.outlook.com SPF record

Queried just now

DNS resolution error Querying SPF record for coppernet-net.mail.protection.outlook.com failed.

check TXT records