For businesses that rely on prompt communication with clients, partners, and internal teams, dependable email delivery is essential. However, numerous organizations still use the default email servers provided by web hosting companies or ISPs, leading to challenges such as low deliverability rates, spam filtering issues, restricted sending limits, and limited insight into email performance. As inbox providers enhance their authentication and security protocols, these drawbacks can harm both brand reputation and customer confidence.
The psychology of phishing: why smart people still fall for scams
by DuoCircle
You think you might know it all about the latest cyber scam trends, what to do when one strikes your organization, and how to evade them, so an attacker can never get to you.
Cybersecurity and email security teams faced a busy week as active exploitation targeted core infrastructure and widely used platforms. Cisco warned of a critical AsyncOS zero-day affecting Secure Email appliances, while SonicWall patched an SMA 100 flaw reportedly chained for root-level takeover. HPE fixed a maximum-severity OneView RCE issue. SoundCloud also confirmed a breach exposing user emails and profile data, alongside outages, VPN blocks, and follow-on disruption.
In the current digital environment, email continues to be a crucial means of communication for companies, while also being a prime target for cybercriminals. As phishing schemes, spoofing, and domain impersonation increase, it’s essential to prioritize the protection of your email systems. This is where the new advancements in DMARC Wizard come into play — robust tools aimed at enhancing and streamlining your email authentication process.
As you know, DNS is the foundation of your brand’s digital presence, so if anything goes wrong with the DNS or worse, if attackers manage to exploit its vulnerabilities, your entire online presence is put at stake.
Implementing DMARC setup is a key strategy to prevent email abuse, enhance deliverability, and protect your organization’s reputation. Understanding and deploying DMARC, SPF, and DKIM are essential for securing your domain, reducing authentication gaps, and ensuring compliance with modern email authentication standards used by services like Yahoo, Gmail, and Google.
The Simple Mail Transfer Protocol (SMTP) is the foundational communication protocol for sending electronic mail across the Internet. Developed by the Internet Network Working Group and standardized in multiple key RFCs—most notably RFC 5321—SMTP governs the process of email transmission between email clients, mail servers, and intermediary systems. As digital communication has become ubiquitous, SMTP’s importance in ensuring the reliable delivery of electronic messages cannot be overstated.
Is p=reject the ultimate DMARC policy? 5 situations in which you should implement it
by DuoCircle
Out of the three DMARC policies—“p=none”, “p=quarantine”, and “p=reject” each serves a different purpose and provides a different level of security. But when it comes to actively blocking emails that attempt to spoof your domain, the strictest policy, “p=reject,” is the best choice.
Selecting the right web-based email server is foundational for both businesses and individuals who rely on secure, efficient, and reliable email communication. Whether you need a robust business email solution, secure email for personal use, or scalable webmail for your growing team, examining the essential features is crucial.
Cyber incidents this week spanned operating systems, browsers, enterprise platforms, hardware, and developer tooling. Microsoft closed out the year patching 56 Windows flaws and three zero days, while Google rushed an emergency fix for an actively exploited Chrome bug. Fortinet, Ivanti, and SAP shipped critical updates for auth bypass and RCE risks, and new PCIe IDE weaknesses prompted firmware work from Intel and AMD. At the same time, a Gogs zero day and abused GitHub tokens highlighted ongoing threats to software supply chains.
![Cisco AsyncOS Exploited, SonicWall SMA Fix, HPE OneView Patched – Cybersecurity News [December 15, 2025]](https://www.duocircle.com/wp-content/uploads/2025/12/spf-record-tester-3450.jpg)
![Microsoft 2025 Fixes, Chrome Zero-Day, Enterprise Security Flaws – Cybersecurity News [December 08, 2025]](https://www.duocircle.com/wp-content/uploads/2025/12/spf-record-3456.jpg)