Domain Security Guides
Plain-English guides to help you understand domain security threats and protect your business. Written for website owners, not IT departments.
What is DMARC and Why Does Your Domain Need It?
DMARC (Domain-based Message Authentication, Reporting & Conformance) prevents attackers from sending emails that look like they come from your domain. Learn how DMARC works with SPF and DKIM, what the three policy levels mean (none, quarantine, reject), and how to set it up step by step.
Read Guide → Email SecurityWhat Does "SPF Record Missing" Mean?
If your domain scan shows "SPF record missing," anyone can send emails pretending to be your business. Learn what an SPF record is, why it matters for email deliverability, and follow our step-by-step guide to add one in minutes — even if you've never touched DNS before.
Read Guide → Domain ProtectionWhat is Domain Hijacking and How to Prevent It?
Domain hijacking is when an attacker takes unauthorized control of your domain name — redirecting your website, intercepting your email, and damaging your brand. Learn how hijacking works, the warning signs to watch for, real-world cases, and a prevention checklist to lock down your domains.
Read Guide → Phishing DefenseWhat is a Lookalike Domain Attack?
Attackers register domains that look nearly identical to yours — like "paypa1.com" instead of "paypal.com" — to phish your customers and employees. Learn about typosquatting, homoglyph attacks, real-world examples, and how to detect lookalike domains before they cause damage.
Read Guide → SSL / TLSSSL Certificate Expired? What It Means and How to Fix It
An expired SSL certificate triggers browser warnings that scare away visitors, breaks payment processing, and hurts your Google rankings. Learn why certificates expire, how to check your expiry date, how to renew (including free options), and how to set up monitoring so it never catches you off guard again.
Read Guide →Not sure where to start?
Run a free domain security scan to see which of these issues affect your domain right now.
Free Domain Scan →