Spamhaus is making some changes in their policy enforcement, from their website: Are you currently using the Spamhaus Project’s DNS Blocklists (DNSBLs)? Do you access them via the Public Mirrors, for example, query “sbl.spamhaus.org” or “zen.spamhaus.org”? Do you use Cloudflare’s DNS? If you’ve answered “yes” to all three of those questions, you need to make […]
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 […]
Customizing the Modern UI theme colors and logo
By Barry de Graaff on June 22, 2022 in Community, Open Source, PowerTips – Admins, Zimbra Partners, Zimlets
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 […]
Zimbra SkillZ: How to use Zimbra with multiple HTTPS domains (Server Name Indication)
By Barry de Graaff on June 1, 2022 in Community, PowerTips – Admins, Security & Privacy, Zimbra Server, Zimbra SkillZ
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 […]
Zimbra SkillZ: Create Zimbra Delegated Administrators
By Barry de Graaff on November 24, 2021 in Product News, Community, PowerTips – Admins, Zimbra SkillZ
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 […]
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 […]