Email trust is no longer a background technical detail—it’s the foundation of how brands communicate, protect users, and preserve reputation in an increasingly hostile digital landscape. As phishing attacks grow more sophisticated and inbox providers tighten authentication standards, traditional approaches to DomainKeys Identified Mail (DKIM) are starting to show their age. “Trust by Design” isn’t just a concept; it’s a necessary shift in how organizations configure and manage DKIM to ensure integrity, alignment, and long-term deliverability.
A well-formed DKIM record is the foundation of email authentication. It publishes a public key in DNS so receiving gateways can verify a DKIM signature (a digital signature in the DKIM-Signature email header) created with your private key.
UK Cyber Surge, Poland Incident Surge, Japan Shipping Attack – Cybersecurity News [April 13, 2026]
by DuoCircle
Here are the top four cyber incidents from last week that kept the cybersecurity experts on their toes. While the UK is experiencing four major cyber incidents every week, Poland is going through a phase of “digital war.” In Japan, a renowned shipping company was targeted by the cybercrooks. Meanwhile, an Irish student got arrested as he tried breaking into the IT network of the school.
Enterprise email security: Here’s what you should know about it
by DuoCircle
When your organization operates at scale, emails don’t go out from one domain; they are sent from marketing platforms, HR systems, finance tools, third-party vendors, and dozens of individual teams.
Every verified email has an unseen signature that plays a crucial role in establishing trust, and this is where DKIM (DomainKeys Identified Mail) comes into action. In an era where cybersecurity threats, spoofing, and phishing are on the rise, implementing DKIM has evolved from a mere technical requirement to an essential component of email authentication. But what exactly goes on behind that signature?
In the fast-moving digital world of today, effective email delivery is essential for businesses that rely on smooth communication and customer interactions. Whether you’re dispatching transaction notifications, marketing initiatives, or crucial information, using a managed outgoing SMTP email server guarantees that your emails arrive securely and punctually. Yet, with numerous providers offering different features, pricing structures, and deliverability rates, selecting the best one can be daunting.
As email security continues to advance, the inbox serves as a crucial entry point, with DKIM testing playing an essential role in its protection. DomainKeys Identified Mail (DKIM) functions as a verifier of digital signatures, confirming the authenticity of every email that arrives, ensuring it hasn’t been altered and genuinely originates from the stated sender.
Apple Pay Scam, Crypto Fraud Victims, Retirement Phishing Loss – Cybersecurity News [April 06, 2026]
by DuoCircle
Here are the top four cyber incidents from last week that kept security experts on their toes. A new Apple Pay phishing scam is doing the rounds, targeting 1.8bn iPhone users. Over 20,000 crypto fraud victims have been identified across Canada, the UK, and the US. An old man from Philadelphia lost his entire retirement savings because of a phishing attack. Just ahead of the IRS deadline, i.e., April 15, security experts have noticed a steep spike in tax refund scams.
How ARC resolves email authentication for forwarded messages
by DuoCircle
When you forward an email, it might look like the message is simply being passed along to the recipient, as it is. You and your reader will see it as unaffected, but to the receiving server, it can appear very different.
The Sender Policy Framework is deceptively simple: publish a single SPF record as a TXT record in your domain DNS so receiving systems can check whether a connecting mail server is an authorized server to send on your behalf.
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