Beware of fraudulent activities using the newly launched .zip and .mov top-level domains. Phishing attacks have already targeted well-known brands like Microsoft and Okta. Apart from phishing, the new .zip and .mov TLDs have also been used for various malicious purposes like hosting zip bombs, redirecting to YouTube videos, and offering file compression services. Here […]
Archive | Security & Privacy
Patch for Zimbra Daffodil 10.0.1, 9.0.0 Patch-33 & 8.8.15 Patch-40
Cases of Compromised Servers are still a concern for 9.0.0 and 8.8.15 servers It has come to our attention that compromised systems are still prevalent and have not been adequately cleaned. Proactive security measures is essential for the long-term success of your organization. To safeguard your system, we recommend you always upgrade to the latest […]
Zimbra advanced mobile device management with Scalefusion MDM
Zimbra 10 is natively supported in Scalefusion Mobile Device Management (MDM). When used together Zimbra and Scalefusion gives your IT teams visibility and control required to secure, manage and monitor any corporate-owned or employee-owned devices that access corporate data. This includes mobile devices (Android and IOS) and managed Windows devices such as laptops. In other words with […]
10 steps to check Zimbra server for compromise
Hackers often install webshells on onpatched Zimbra systems and then wait for some time before actually abusing the compromised system. Especially on systems where critical security patches where installed too late, it may seem all was OK, where in fact a hacker has already gained access to the system, but did not do any other […]
Configure Zimbra OpenDKIM to sign the Subject header
By default Zimbra OpenDKIM does not sign the Subject header. At this time the configuration of what headers are signed by Zimbra OpenDKIM cannot be done via zmprov. There is a pending feature request to make these headers configurable via zmprov. In this article you will learn how to configure Zimbra OpenDKIM by customizing the […]
A Milter for using Spamhaus HBL with Zimbra Postfix
In this article you will learn how to use Spamhaus Hash Blocklist (HBL) to improve email protection in Zimbra. For a long time administrators of Zimbra have relied on Spamhaus to fight incoming spam by configuring Postfix using traditional blacklists. These traditional blocklists work by blocking IP (ranges) and domains of known spammers. When an […]