The Kalenfy blog
Security, in plain English
Guides on SPF · DMARC · DNSSEC & more — then scan your site free
Email authentication
27 June 2026
What Is DMARC and How to Set It Up (Plain-English Guide)
DMARC explained in plain English: what a DMARC record is, how p=none, quarantine and reject work, how to check your DMARC record, and the common mistakes to avoid.
Read guide
Guides & checklists
27 June 2026
How to Check if Your Website Is Secure (Free 2026 Checklist)
A practical, free checklist to check if your website is secure in 2026 — HTTPS, SPF, DKIM, DMARC, DNSSEC, security headers and exposed files, with how to test each.
Read guide