How to block incoming users or domains

Hello everyone, Zimbra Collaboration includes anti-SPAM and antivirus technologies such as Postscreen, Spamassasin, Amavis, ClamAV, etc. But sometimes, for legal reasons, etc., we need to block certain senders or even entire domains from sending unsolicited email. To do this, we will use the tools that come native to Zimbra Collaboration, Continue Reading

ClamAV v0.97 included in ZCS 8.0.6 and below tags all messages as **UNCHECKED**

Hello Everyone. If you are using ZCS 8.0.6 and prior: starting 22 October 2016, anti-virus definitions will no longer update, and your ClamAV instance will stop working entirely. This is a real risk for all outdated ZCS versions, and as a visual symptom, all your messages are being tagged as Continue Reading

Android Spywaller: Firewall-Style Antivirus Blocking

Malware has been known to use new and innovative ways to evade detection by Antivirus software, a phenomenon AV analysts have often seen with PC malware. Not a lot of examples of the same have been seen employed by mobile malware. A recently discovered Android malware has brought to light Continue Reading

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