Email Security
Email remains the most common delivery channel for phishing, and the technical systems behind it — SPF, DKIM, DMARC, link rewriting — are rarely explained in plain terms.
These guides break down how email authentication works, how attackers spoof trusted senders, and why a link inside an email message can look completely different from the page it actually opens.
Email Security Guides
Email Spoofing Explained: How Fake Sender Emails Work
Complete guide to email spoofing. Learn how fake sender emails work, how attackers impersonate brands, SPF, DKIM, DMARC protection, and how to identify spoofed emails.
Read guide →SPF Explained. What SPF Records Are and Why They Matter
Complete SPF guide. Learn what SPF records are, how Sender Policy Framework works, how SPF prevents email spoofing, SPF syntax examples, limitations, and best practices.
Read guide →DKIM Explained and How It Protects Against Email Spoofing
Learn what DKIM is, how DKIM signatures work, how attackers abuse email, how to verify messages, and how 2check.click helps investigate suspicious links and phishing campaigns.
Read guide →DMARC Explained. How DMARC Protects Domains from Email Spoofing
Complete DMARC guide. Learn how DMARC works, DMARC policies, email spoofing protection, DMARC reports, SPF and DKIM alignment, and implementation best practices.
Read guide →Email Link Rewriting Explained
Learn why email security systems rewrite links, how link rewriting works, and how attackers abuse similar techniques in phishing campaigns.
Read guide →Why Links Look Different in Email and How to Spot Phishing Destinations
Learn why email links often look different from their final destination, how security systems rewrite URLs, how attackers abuse redirects, and how to investigate suspicious email links safely.
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