DNS plays a critical role in sending and receiving email: it provides the infrastructure mail servers rely on to talk to each other. Yet proper DNS configuration is often neglected—or people assume it happens automatically. Fact is: even if you’re on M365, you must configure these records yourself. If you don’t, your emails will land...
The CheckFix Blog is intended as a tutorial where we thoroughly explain the most important IT security measures and back them up with examples. Our team of IT security specialists spends their professional lives focused exclusively on cybersecurity — we like to call ourselves “Good Hackers.” Why? Because we hack into our clients’ systems to...
As long as it works” is yesterday’s mindset. In modern software development, building security in early determines quality, efficiency, and trust. Shift Security Left ensures that vulnerabilities are discovered and fixed before they cause damage — saving companies time, money, and nerves.
Emails are still part of everyday business—like scissors for a hairdresser and a trowel for a bricklayer. That’s exactly why they’re a popular target for hackers. Unencrypted messages are like postcards: anyone who gains access along the way can read them. In this article, you’ll learn why email encryption is mission-critical—technically, legally, and commercially. We’ll...
SNI (Server Name Indication) is an extension of the TLS protocol. It lets the browser name the requested domain right at the start of the connection, so the server can deliver the matching certificate. This is what allows many HTTPS websites to share a single IP address. Imagine you’re the ruler of a digital fortress....
