Hello everyone, who is the loyal Zimbra customers, partners, and especially Service Providers running Zimbra. Here we will hold a series of Webinar featuring Synacor Zimbra mail operation manager Matthew Berg sharing his experience with the large-scale mail operation. Matthew Berg is the Lead Email Engineer at Synacor since he joined the firm back in […]
Archive | PowerTips – Admins
Zimbra Collaboration 8.6 Patch 4 and previous (CWE-79, CVE-2015-7609) – XSS vulnerabilities
On December 22, 2015, we announced patch 5 for Zimbra Collaboration 8.6. Patch 5 contained fixes for eight security issues, including two cross-site scripting (XSS) vulnerabilities (assigned CVE-2015-7609) that were reported in October of 2015 by security researchers at Fortinet’s Fortiguard Labs. It was a pleasure working with one of the top security companies out there. If […]
Zimbra Collaboration 8.6 Patch 4 is here – 47 fixed Bugs & Edge Support
We are delighted to announce Patch 4 for Zimbra Collaboration 8.6. This patch gives full support for Microsoft Edge in Zimbra Collaboration 8.6.0, and fixes up to 47 Bugs focusing on EWS compatibility and many others. Please do a full backup or snapshot before installing this Patch. You can download the patch and the md5 […]
How to add your Logo in the Login and App window in Open Source or Network Edition
A frequently asked question in our Forums is if Open Source users can re-brand the Login and App Logo. You can find more information about licensing in the next Official FAQ PDF, question 33 through 37 which contains related questions and answers about re-branding the logo, but here are some basics: How can I add my […]
Zimbra, MySQL, Java and the Leap Second, High CPU problem
We survived the leap second, as we did to Y2K, with no Critical problems reported by our Customers. We did some tests a time ago and we tracked the issue in the Bug 100014. However you may see some CPU problems with MySQL and Java in your Zimbra Collaboration environment, like the next picture for example […]
Email Protection Best Practices: SPF, DKIM and DMARC
By Jorge de la Cruz on April 9, 2015 in Open Source, PowerTips – Admins, Security & Privacy, Zimbra Server
As Zimbra Collaboration is a central communication hub for your business, it needs to be protected and secured. Zimbra Collaboration contains multiple antispam features like SpamAssassin, Amavis-d, etc. But, how do you protect against spoofing? How do we ensure outgoing emails are not going into the junk folder of recipients using other platforms like Google Apps, Outlook 365, […]