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Can my competitor bypass this security meassure by sending e-mails from competitor.com using my domain secret.com? Yes, competitor can bypass this, but not easily. Lets say that SPF is "v=spf1 include:spf.mandrillapp.com ~all" This means that I allow server spf.mandrillapp.com to send emails for my domain, while all other will SoftFail (that is the ...


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DNSSEC and DNSCurve essentially do the same thing. They allow a client to verify that the records in a DNS response are identical to what the zone owner initially configured. They're not bulletproof; parent zones, registrars and registries can still do whatever they want with zones they are directly or indirectly authoritative for. But it's still better than ...



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