Guides and tutorials on DNS records, email authentication, and domain management.
A complete guide to email authentication protocols and how they protect your domain from spoofing and phishing.
EmailLearn how SPF records authorize mail servers to send email on behalf of your domain.
EmailUnderstand how DKIM uses cryptographic signatures to verify email authenticity.
EmailLearn how DMARC ties SPF and DKIM together and tells receivers how to handle unauthenticated email.
DNSUnderstand how MX records direct email to the right mail servers and how priority values work.
DNSA comprehensive reference for every common DNS record type, what it does, and when to use it.
PropagationLearn why DNS changes take time to spread and how to verify propagation across global servers.
DNSStep-by-step guide to looking up DNS records using online tools and command-line utilities.
EmailA practical walkthrough for verifying your SPF, DKIM, and DMARC configuration is correct.
DNSLearn what every DNS response flag means — AA, TC, RD, RA, AD, CD, and RCODE — and how DNSSEC protects DNS lookups from tampering.
DelegationUnderstand how DNS delegation splits the namespace into zones, how queries travel from root servers to authoritative nameservers, and how to trace the chain.