Zimbra memcached may face the “memcrashd” attack on port 11211. By default, memcached listens on a server IP address that is accessible on the network and via the internet if there is no firewall. If your Zimbra memcache servers are behind a firewall, we recommend blocking access on port 11211 from the Internet to Zimbra […]
Archive | PowerTips – Admins
How to Install Zimbra Collaboration 8.8 on Ubuntu 16.04 LTS
Greetings, Everyone. In this blog post we will cover the installation of the latest Zimbra Collaboration 8.8 Network Edition release on Ubuntu 16.04 LTS, using dnsmasq as a DNS Server. These steps cover a single-server installation. If you are looking for multi-server installation steps, please visit our official guide. This blog post is a bit […]
How to Reduce Incoming SPAM and MTA Overload using Postscreen
Zimbra Postscreen, availabile starting with Zimbra Collaboration 8.7, provides additional protection against mail server overload. One postscreen process handles multiple inbound SMTP connections and decides which clients may talk to a Post-fix SMTP server process. By keeping spambots away, postscreen leaves more SMTP server processes available for legitimate clients and delays the onset of server overload […]
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, and with a few simple […]
Zimbra Desktop, the best ally of a Zimbra experience in your workstation
Zimbra Desktop is a free and open source email client application that gives you online and offline access to all your email accounts in one place. It’s the best ally offering the best Zimbra experience in your workstation without any additional cost, and available for Windows, Mac and Linux. Principal advantages of using Zimbra Desktop Zimbra […]
How to use the new Zimbra Migration Tool: pst file to Zimbra Desktop
Hello, Everyone. On today’s blog I will answer the frequently asked question: How can I import a .pst file into my Zimbra Desktop? The answer is with the new Zimbra Migration Tool, included in Zimbra Collaboration 8.7 and above. You can find the most recent one here: For Windows 32bits – ZimbraMigration_8.7.1.1661_x86.zip For Windows 64bits […]
