E-mail providers like Microsoft Exchange Online and GMX allowed to pass <LF>.<CR><LF> sequence unfiltered from their outbound (sending mails) SMTP server to the inbound (receiving mails) SMTP server (postfix in our case). In the case of Postfix serving as an outbound/inbound (sending mails/receiving mails) server, it does not ignore the sequence ‘<LF>.<CR><LF>’; rather, it interprets […]
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CentOS 7 and CentOS8 Stream EOL dates are closing in
Keeping your Zimbra up-to-date by installing patches is essential for maintaining the security of your Zimbra servers. However patches are only available for supported (not end-of-life) versions. Recently the 8.8 versions of Zimbra went end-of-life and the Zimbra 9 versions are going end-of-life soon as well. Make sure all your Zimbra servers are on a […]
Zimbra and SMTP Smuggling attack on Postfix
Recently an SMTP Smuggling attack on Postfix was published, as mentioned by the Postfix project: Days before a 10+ day holiday break and associated production change freeze, SEC Consult has published an email spoofing attack that involves a composition of email services with specific differences in the way they handle line endings other than <CR><LF>. […]
ChatGPT knows the Zimbra API’s
By Barry de Graaff on December 27, 2023 in Product News, Artificial Intelligence, Did You Know, Partners, PowerTips – Admins
Zimbra has many API’s to make it easy for system administrators to automate tasks, such as account creation, distribution list management, quota management etc. In many cases you will be using the SOAP and REST API’s or command line tools such as zmprov and zmmailbox. While there is documentation of these API’s on the Zimbra […]
Adding images in your email signatures in Modern UI
As requested by many partners we have added support for adding images in email signatures in Modern UI. To be able to use this feature you have to update to the latest patch version of Zimbra (10.0.6). Adding a Signature is done via the Gear menu -> Settings -> Signatures
Patch Release For Deprecated Files Deletion, OpenJDK Security Enhancement, Migration Support to Zimbra Daffodil (v10)
Patch Severity: High. This release addresses critical bug fixes and essential security updates Patch Release for the following editions Zimbra Daffodil 10.0.6 (Release Notes) Zimbra 9.0.0 Kepler Patch-38 (Release Notes) Zimbra 8.8.15 Joule Patch-45 (Release Notes) Patch updated on 18 Dec include the following in their respective releases What’s New OpenJDK has been upgraded to […]