How email authentication helps you prove sender identity under ISO 27001
by DuoCircle
Email is one of the main ways companies talk to customers, partners, and even their own teams. Because it is used so much, it also becomes an easy target for attackers who try to pretend to be someone else or steal important information. When a business wants to follow ISO 27001, it needs to show that its messages are safe and really coming from the right sender. That is where email authentication becomes helpful.
Cybersecurity headlines this week show a clear picture, and no one seems immune. Hyundai confirmed a data breach that may have exposed millions of Social Security numbers, and Google has gone on the offensive, suing a China-based group accused of running a billion-dollar phishing operation.
What happens when you misconfigure DKIM for your domain?
by DuoCircle
Your outgoing emails are only as safe as the configuration of your authentication protocols, like DKIM or DomainKeys Identified Mail. We say this because your emails are not inherently secure, which means anyone can intercept your outgoing emails and try to alter or impersonate them before they reach your recipients. This happens when you have not implemented DKIM at all or configured it incorrectly.
When I first started managing email campaigns, I spent hours crafting individual messages, manually segmenting lists, and tracking responses. This process was no walk in the park and left little to no room for strategic planning.
DomainKeys Identified Mail (DKIM) is a critical component of modern email authentication frameworks. As email threats such as phishing and spoofing continue to increase, leveraging a DKIM signature checker has become indispensable for organizations aiming to protect their domain reputation and ensure email deliverability.
Sender Policy Framework (SPF) records are an essential component of email authentication strategies designed to mitigate email spoofing and improve email security. These DNS TXT records specify which email servers are authorized to send outgoing email on behalf of your email domain.
Ensuring robust email security has become a pivotal concern for domain owners and organizations worldwide. Email threats such as phishing, spoofing attacks, and fraud are increasingly sophisticated, making proper email authentication protocols critical. Domain-based Message Authentication, Reporting & Conformance (DMARC) stands as a frontline defense mechanism, empowering organizations to protect their domains from email spoofing and improve overall email deliverability.
This week saw a surge in major cyber incidents worldwide. A ransomware attack crippled Japan’s Askul retail network, Qilin claimed Habib Bank AG Zurich, and Google uncovered AI-powered malware that rewrites its code. Cisco issued urgent fixes for firewall exploits, while Oglethorpe and NMHC disclosed healthcare data breaches.
How does BIMI complete the email authentication story?
by DuoCircle
Your emails are not inherently secure. This means when you send emails to your clients, there’s nothing in the default email protocol that guarantees the message actually came from you or wasn’t manipulated along its way.
![Hyundai Leak Exposed, International Malware Bust, Lighthouse Phishing Lawsuit – Cybersecurity News [November 10, 2025]](https://www.duocircle.com/wp-content/uploads/2025/11/spf-record-check-3501.jpg)
![Askul Ransomware Disruption, Qilin Targets Habib, Google Exposes Malware – Cybersecurity News [November 03, 2025]](https://www.duocircle.com/wp-content/uploads/2025/11/spf-record-5602.jpg)
