How can enterprises fix the 10 DNS lookup limit issue
by DuoCircle
For many enterprises, SPF failures are not caused by incorrect syntax or missing records. They happen because the SPF record silently exceeds a technical limit that most teams are not actively monitoring: the 10 DNS lookup limit. As organizations scale their email operations, they naturally add more sending tools, vendors, and services. Over time, this creates complex SPF records that appear valid on the surface but fail during real-world evaluation by inbox providers.
Ensuring successful email delivery is vital for businesses, yet even the most meticulously designed campaigns can be compromised by SPF issues. The Sender Policy Framework (SPF) is designed to thwart email spoofing by outlining the mail servers permitted to send emails on your behalf. However, there’s a significant drawback: the limitation of 10 DNS lookups. Surpassing this threshold can result in SPF checks failing, causing emails to end up in spam boxes or, in some cases, being outright rejected.
Chinese buses vulnerable Europe, $48M Bitcoin phishing stolen, WEF 2026 India participates – Cybersecurity News [January 23, 2025]
by DuoCircle
This is the fourth edition of the month, and here are the top cyber incidents that kept people busy last week. While Australia and Europe have discovered vulnerabilities in Chinese electric buses, South Korea lost $48 million worth of seized Bitcoin due to a phishing scam. Meanwhile, 1Password has come up with a highly effective anti-phishing feature to prevent sophisticated phishing campaigns. Also, global leaders, including India, gathered at WEF 2026 and discussed cybersecurity among other crucial topics.
A modern DMARC report analyzer with live dashboards and proactive alerts changes how organizations interpret DMARC aggregate reports, turn XML reports into insight, and act on threats. Whether you’re getting started with DMARC or moving through DMARC toward full enforcement, a robust DMARC Management Platform combines immediate visibility, automated report analysis, and guided policy tuning.
DKIM helps email providers verify that a message really came from your domain and that it was not changed while being delivered. At the heart of DKIM is a pair of cryptographic keys called the public key and the private key. These two keys work together to sign emails and prove their authenticity to receiving mail servers.
While email appears to be seamless and immediate for users, there’s a complex system in place that ensures performance, security, and trust in the inbox. A key component of this system, often misinterpreted, is SMTP throttling. Regardless of whether you’re dispatching transactional emails, marketing blasts, or bulk notifications, SMTP throttling regulates the speed, frequency, and volume of mail your server can transmit before restrictions take effect.
A rigorous DKIM troubleshooting workflow helps you isolate and remediate the exact cause of a DKIM fail before it cascades into deliverability issues or mail server rejection.
College life depends on being online. From registering for classes and submitting assignments to paying bills and staying in touch with friends, nearly everything happens through a screen. That constant connection makes life easier, but it also creates risks many students don’t think about until something goes wrong. Cybersecurity isn’t just an issue for big companies or tech experts. It affects students every day, often in quiet ways that don’t seem serious until accounts are locked, files disappear, or money goes missing.
Email authentication can feel deceptively simple—until SPF records start failing and legitimate messages land in spam. One of the most common and frustrating causes is the SPF 10 DNS lookup limit, a technical restriction that many organizations hit as they add third-party email services.
![Chinese buses vulnerable Europe, $48M Bitcoin phishing stolen, WEF 2026 India participates – Cybersecurity News [January 23, 2025]](https://www.duocircle.com/wp-content/uploads/2026/01/email-smtp-service-7865.jpg)
