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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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_spf1.gtnexus.com SPF record

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Invalid SPF record One of the terms in the SPF record for _spf1.gtnexus.com is invalid.

check TXT records