What is DMARC and does my business need it?
What DMARC is, how it works with SPF and DKIM, and whether your business needs it. A plain-English guide with steps based on NCSC and Google guidance.
Read the guide →How to check when your SSL certificate expires
Three simple ways to check when your SSL certificate expires, why certificate lifetimes are getting shorter from 2026, and how to avoid surprise expiry.
Read the guide →Security headers explained in plain English
What website security headers are, what each common header does in plain English, and how to check which ones your site sends. With links to MDN and OWASP.
Read the guide →Why your domain renewal date matters
What happens when a business domain expires, how .uk and .com renewal grace periods work, and simple steps to make sure your domain renewal date is never missed.
Read the guide →Want to know where your own website, email and domain stand? Request a free, no-obligation external security check for a domain you own or are authorised to have checked.
Request a free security check