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Learning DNS for Developers

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amazon.com 216.73.216.106 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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cs361demo.awk.jp SPF record

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Invalid SPF record One of the terms in the SPF record for cs361demo.awk.jp is invalid.

check TXT records