This edition covers all the major cyber incidents of recent times that every cybersecurity enthusiast must be aware of. 1.3 million LinkedIn users are at risk of cyber scams. 600+ illegally routed Indian SIM cards have been nabbed in Cambodia, which otherwise would have been used to carry out malicious cyber scams. High-profile individuals are at risk of social engineering attacks via WhatsApp and Signal. Meanwhile, it has become way too easy for cybercrooks to target elderly people by using artificial intelligence.
Navigating email authentication can often feel overwhelming, particularly when it comes to DKIM validation and ensuring your emails reach their intended destination: the inbox. Whether you’re in marketing, IT, or running a business, becoming proficient with your DKIM validator is more than just a technical necessity; it’s a significant edge over the competition. A single error in configuration could adversely affect your email deliverability, tarnish your sender reputation, and leave your domain vulnerable to spoofing.
What happens when your DKIM key is compromised? How can you identify and fix the problem?
by DuoCircle
As you might already know, DKIM protects your outgoing emails from being tampered with while they are on their way to the recipient’s inboxes. It does this by attaching a digital signature to your outgoing emails. When receiving servers get those emails, they verify that signature using the public key published in your DNS.
Email is still the most exploited initial vector of attacks in cybersecurity. Phishing is still considered the number one initial access vector in breach investigations, and at the core of all phishing attacks is domain spoofing.(more…)
This step-by-step guide explains how to prepare your Microsoft 365 tenant and custom domain to publish a DKIM record, locate your Microsoft-managed DKIM key hostnames, and understand how DomainKeys Identified Mail works under the hood. You will learn how DKIM’s email authentication model uses a cryptographic signature based on a public key and private key pair to protect email messages as they traverse SMTP, and how Microsoft 365 implements selectors to support safe key rotation.
Email-centric threats continue to be a prevalent and expensive cybersecurity challenge for both companies and individuals. With phishing methods evolving in complexity, businesses are turning to advanced security solutions to spot and prevent harmful emails from landing in their mailboxes.
Here are the top cyber incidents from last week that kept the cybersecurity professionals on their toes. A highly sophisticated AI-powered phishing campaign is targeting hundreds of thousands of businesses worldwide. Meanwhile, TikTok business profiles are on the radar of cybercriminals. In a shocking turn of events, the Dutch Police became the victim of a threat attack. Also, authorities were forced to shut down a school in Southampton after a cyberattack.
In the retail industry, building a bond of trust with your clients is of utmost importance, but what happens when the very channel used to build this trust is itself compromised?
Here are some of the biggest head turners from last week’s cybersecurity landscape. While the Horabot banking malware has re-entered Mexico, the Aura data breach exposed a whopping 900,000 customers to potential threats. Meanwhile, cyber incidents are surging because of the ongoing tax season. A new malware, “DarkSword,” is giving nightmares to iPhone users across the globe.
VMC vs CMC explained: Which logo certificate should you choose?
by DuoCircle
Displaying your brand logo in the inbox is becoming an important part of email trust and recognition. With BIMI, businesses can make their emails more identifiable, but this requires choosing the right certificate. This is where VMC and CMC come in. While both allow your logo to appear in supported inboxes, they differ in terms of requirements, cost, and the level of trust they offer.
![LinkedIn Fraud Spike, SIM Scam Bust, UK VIPs Targeted – Cybersecurity News [March 30, 2026]](https://www.duocircle.com/wp-content/uploads/2026/04/spf-permerror-5622.jpg)
![AI Phishing Campaign, TikTok Phishing Targeted, Dutch Police Cyberattack – Cybersecurity News [March 23, 2026]](https://www.duocircle.com/wp-content/uploads/2026/03/spf-permerror-5600-1.jpg)
![Horabot Resurfaces Mexico, Aura Breach Compromise, Tax Season Threats – Cybersecurity News [March 16, 2026]](https://www.duocircle.com/wp-content/uploads/2026/03/spf-record-7898.jpg)
