332 practical guides to website speed, SEO, email deliverability, DNS, security and automation, with fixes you can copy and paste.
How MX priority works, what happens with equal priorities and backup MX, when to use a null MX, and the correct records for Google Workspace and Microsoft 365.
A plain-English guide to DNS records: what A, AAAA, CNAME, MX, TXT, NS and SOA records do, with real zone examples and the mistakes that break sites and email.
IPv6 for small business websites: how many users have it, whether you need an AAAA record, hosting and CDN support, IPv6 email PTR and SPF rules, and testing.
DNS over HTTPS explained: how DoH and DNS over TLS protect privacy, how browsers and Windows use them, what they mean for filtering, and how DNSSEC differs.
Point your domain to a new web host by changing nameservers or A records. A step-by-step guide to moving with no downtime and without breaking your email.
Learn what a CAA record does, how certificate authorities check it, and how to set CAA records for Let's Encrypt, Cloudflare and AWS without breaking renewals.
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