The spam blocklist SORBS has been shut down. By default Zimbra uses SORBS via SpamAssasin, but also many Zimbra Administrators have set-up SORBS as part of Postfix MTA restrictions. Monitor the Zimbra MTA logging in /var/log/zimbra.log and make changes to your configuration to make sure email continues to be delivered properly. Postfix reject_rbl_client Check Zimbra’s […]
Archive | PowerTips – Admins
Admin Account authentication now honors zimbraAuthFallbackToLocal when using external/custom authentication
Zimbra supports various authentication sources for authenticating users. Examples include external LDAP, Active Directory and custom authentication plugins. Prior to Zimbra 10.0.8 the setting of zimbraAuthFallbackToLocal had no effect on administrative accounts. Meaning you could use the username and password from Zimbra LDAP for signing on to an admin account. Even if the admin account […]
Migrating Zimbra Sieve filter rules from one user to another user
In this article you will learn how to migrate filter rules from one user to another user. These are the steps to export and import filter rules from the command line, don’t forget to use the zimbra OS user: 1) Export exiting filter rules of a user and save into a file. zmprov -l ga […]
How to fix Samsung Phones not being able to send mail (ActiveSync)
In this article you will find a short how-to on how to fix the issue that some Samsung phones can receive mail, see calendars, but cannot send mail via Zimbra. Users will see messages go immediately to the outbox with a warning that the message was not sent. ActiveSync protocol version This issue affects only […]
Automatically deploy and update Zimbra Connector for Outlook using OPSI
OPSI, which stands for Open PC Server Integration, is an open-source software deployment and management solution designed primarily for Windows-based networks. It provides a comprehensive suite of tools for automating software deployment, patch management, inventory management, and system configuration across multiple computers in an organization’s network. OPSI is often used for rolling out Windows workstations […]
Disable login using email alias
Historically in Zimbra it has been possible to log in using the account email address, but also using an email alias. For security reasons it is recommended to disable the log in by use of an alias. Follow below steps to find out if alias login is enabled on your Zimbra deployment, and configure it […]