Security
Keeping your website and email trustworthy — headers, certificates and the settings most sites miss.
Other topics
SPF, DKIM and DMARC explained: why your emails land in spam
Three DNS records decide whether your email is trusted. If you've never set them up deliberately, half your outgoing mail is fighting a spam filter.
Security headers explained: what they do and how to get an A grade
Security headers are free, take an hour to configure, and close entire categories of attack. Most sites score badly on them. Here's what each one does.
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