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A step-by-step guide to auditing your website's security and SEO using free tools, in the optimal order for maximum impact.
Read articleA practical guide to finding every subdomain of a domain — DNS enumeration, certificate transparency, search operators, and free tools.
Read articleDMARC aggregate reports arrive as dense XML. Learn how to read them, what each field means, and how to spot SPF and DKIM alignment failures.
Read articleTXT records power email authentication and domain verification. Learn what they do, common mistakes, and a typo-proof checklist.
Read articleWhat the priority number on an MX record actually does, why lower wins, what 0 means, whether two records can share a priority, and how failover really works.
Read articleUnderstanding DMARC alignment is crucial for email security. Learn why your From: domain must match your SPF or DKIM domains to prevent spoofing.
Read articleDNS doesn't take 24-48 hours to propagate. Learn how TTL values control DNS caching and how to minimize downtime during DNS changes.
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