DomainKeys Identified Mail DKIM Preview

In the fifth part of our series on sender reputation, we explain how you can use DNS-based Authentication of Named Entities (DANE) to ensure the authenticity of certificates and protect your email traffic from access by criminals.

NoSpamProxy Summer School Preview

As a security expert, you have a great deal of responsibility and also have your hands full. With our Winter School we offer in entertaining special trainings with many practical examples, for the necessary knowledge. The aim of our security training courses is to give you an understanding of the special IT security topics. Register now and save your place. Register now and save your place.

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During the day, there was a disruption in email traffic to servers of 1&1 ( and GMX) due to a problem in the TLS or DANE area. We suspect it was related to 1&1’s TLS certificate expiring tomorrow. To enable delivery again, simply restart the gateway role(s) to clear the corresponding cache. IMPORTANT: NoSpamProxy Cloud […]

Net at Work kooperiert für NoSpamProxy mit neuem Distributor Fokus MSP 667

Fokus MSP will distribute the entire NoSpamProxy service portfolio, focusing primarily on the cloud offering as well as on system houses and other resellers offering managed services.

DomainKeys Identified Mail DKIM Preview

In the fourth part of our series of articles on sender reputation, we show you how you can use Domain-based Message Authentication, Reporting and Conformance (DMARC) to determine how the receiving server should authenticate your emails and what it should do if authentication fails. In addition, we explain how you can use DMARC to quickly be informed about abuse of your domain and thus protect the reputation of your domain.

Kurz URLs im Heuhaufen

Short URL services such as are consistently used by criminals to get phishing links past email security solutions and onto their victims’ computers. In this article, we show you how short URLs are used as part of spam campaigns and why Heimdall and its dedicated web crawler offer ideal protection against attacks.

DomainKeys Identified Mail DKIM Preview

Ensuring the authenticity of senders is therefore a crucial step in ensuring the security of your IT infrastructure. In part 3 of our series of articles on sender reputation, we show you how you can use DomainKeys Identified Mail (DKIM) to check the domain information of sender addresses and prevent spam and phishing attacks.

Ein Jahr Heimdall und das ist erst der Anfang Preview

Every quarter, our Heimdall research team provides new insights into the current threat situation in the field of email security. The findings, assessments and concrete recommendations are of high value for all email administrators and other persons responsible for IT security – regardless of whether NoSpamProxy is used as a product or not.