Stefan Sturm

About Stefan Sturm

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Meanwhile lets just say that we are proud Stefan Sturm contributed a whooping 374 entries.

Entries by Stefan Sturm

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Action Required: Renew Permissions for the Entra ID User Import

A one-time action is required for the Microsoft user import in NoSpamProxy Cloud: As part of a technical transition, new app registrations will be handled through Microsoft Entra ID. To ensure that the user import continues to function reliably in the future and that changes to users and groups are automatically applied, affected clients must re-consent to the necessary permissions. Please complete this update by September 1, 2026, at the latest.

14.08.2026 by
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NoSpamProxy and TLS Certificates: What Will Change by 2029

The validity period of publicly trusted TLS certificates will be gradually reduced over the coming years. For administrators, this means a significantly greater workload in terms of certificate management, unless this process is automated. This article explains the background of the change, the specific timeline, and the planned approach for NoSpamProxy.

07.08.2026 by
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Security Enhancement: Optimized Sender Verification for the Microsoft 365 Connector

Microsoft Exchange Online is used by numerous companies as their primary email platform. However, this shared infrastructure imposes specific requirements for the secure processing of incoming messages. With this latest update, NoSpamProxy improves sender verification for the Microsoft 365 Connector and enhances security by additionally verifying that only emails from the configured Microsoft 365 tenants are processed. This further enhances protection against spam and phishing attacks via Exchange Online.

05.08.2026 by
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Understanding DMARC Reports and Making the Most of Them

DMARC reports show what happened. NoSpamProxy 25Reports helps you understand why it happened and what you should do next. With visualized context, automated analysis, and concrete recommendations for action, complex DMARC data becomes a clear basis for decision-making. We’ll show you why 25Reports is indispensable if you need concrete recommendations for your DMARC configuration to identify risks and protect your email communications in a controlled manner.

31.07.2026 by
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Email Rules as a Point of Entry: How Attackers Take Control of Microsoft 365 After Compromising an Account

Email rules are actually designed to organize your inbox: automatically moving, forwarding, or marking messages as read. It is precisely these functions that make them attractive to attackers once an account has been compromised. In many cases, at least one malicious email rule is created shortly after the initial access, sometimes within seconds of the unauthorized login. We’ll show you how these attacks work and how you can protect yourself.

24.07.2026 by
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Seasonal threat: Cybercriminals don’t take vacations

Summer is here, out-of-office replies are enabled, and besides those looking forward to vacation, there’s one group that’s especially happy: cybercriminals. While half the workforce is at the pool, the other half is working from home or covering for colleagues, and it’s precisely this state of stress, distraction, and vacation planning that provides the perfect breeding ground for phishing emails to thrive.

09.07.2026 by