Articles - Page 7
STARTTLS, SSL/TLS and SMTP: which encryption for your emails?
SSL, TLS, STARTTLS, Implicit TLS, DANE, MTA-STS: email encryption in transit relies on mechanisms that are often confused. This guide clarifies each protocol, explains their vulnerabilities, and shows how to configure robust TLS encryption on Postfix, Exim and Exchange.
SMTP ports explained: 25, 465, 587, 2525, which one should you use?
Port 25, 465, 587, or 2525? Each SMTP port has a specific role. This guide breaks down how each port works, its encryption method, the relevant RFCs, and helps you pick the right port for your use case.
How to test the SMTP connectivity of your MX servers
Your DNS records are perfect, but emails aren't getting through? The problem might be at the transport layer. This guide shows you how to test SMTP connectivity for each MX server, step by step.
Phishing trends 2025-2026: APWG statistics and new techniques
Phishing has evolved: generative AI, malicious QR codes, MFA bypass. Explore the 2025 APWG figures and the techniques redefining the threat landscape in 2026.
Google Safe Browsing, URLhaus, PhishTank, VirusTotal: how threat intelligence databases work
Every day, your browser queries threat intelligence databases to block malicious URLs. Learn how the 4 main databases work and why combining them is essential.
Clicked a phishing link: what to do right now?
3.4 billion phishing emails are sent every day. If you clicked a suspicious link, follow these emergency steps to limit the damage and secure your accounts.
How to spot a phishing email in 2026
91% of cyberattacks start with an email. Learn how to spot the warning signs, verify a suspicious link, and protect your inbox with the right protocols.
Set up TLS-RPT: step-by-step guide for Microsoft 365, Google Workspace, and OVHcloud
Hands-on tutorial to set up TLS-RPT (SMTP TLS Reporting) on Microsoft 365, Google Workspace, and OVHcloud. DNS record, verification, and troubleshooting included.