Archive | PowerTips – Admins

Deprecation of the “X-XSS-Protection” header

Hello Zimbra Customers, Partners & Friends, In the past Zimbra recommended to set the X-XSS-Protection HTTP response header. This header used to enable additional protection against cross-site scripting (XSS) attacks in some web browsers. However this header is now deprecated and support is removed from most browsers. In case you have configured Zimbra to use […]

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Customizing the Modern UI theme colors and logo

With the Simple Theme customizer Zimlet you can change the Modern UI appearance in a fast and easy way. Simple Theme customizer Zimlet supports setting the primary and secondary color and the logo on Zimbra Modern UI. You can set these settings globally or per domain. Configuring and installing Create a file /tmp/zimbra-zimlet-simple-theme.xml with the […]

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Zimbra SkillZ: How to use Zimbra with multiple HTTPS domains (Server Name Indication)

This article is a short how-to on making your Zimbra reachable via multiple HTTPS domains. This will allow your users to reach Zimbra using different URL’s such as: https://mail.zimbra.com and https://mail.zimbra.org. Set-up initial TLS certificate Set-up Zimbra to work with the fist HTTPS domain. Install the certificate obtained from your Certificate Authority by using one […]

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Zimbra SkillZ: Create Zimbra Delegated Administrators

Hello Zimbra Customers, Partners & Friends, Sometimes it’s necessary to delegate administrative tasks in Zimbra. For example, letting your help desk staff do daily tasks like reset passwords, change account names, unlock accounts and create accounts can really improve your first line support. Zimbra lets you grant permissions that can be set on an account […]

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Zimbra SkillZ: Add an External Email Warning in Zimbra

Hello Zimbra Customers, Partners & Friends, In today’s blog, I’ll show you how to add an external email warning message in Zimbra when receiving an email from an external domain. This is done using a Sieve filter, and it can be enabled per account, COS, domain and server. First, create /tmp/myfilters su – zimbra nano […]

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Zimbra SkillZ: Using Zimbra with Strong TLS Configuration – Get an A+, No Weak Cyphers

Hello Zimbra Customers, Partners & Friends, Transport Layer Security (TLS) encrypts data sent over the internet to ensure that eavesdroppers and hackers can’t see what you transmit. This is particularly useful for private and sensitive information such as passwords, credit card numbers and personal correspondence. To learn more about TLS, https://www.internetsociety.org/deploy360/tls/basics This blog shows you […]

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