Author Archive | Barry de Graaff

Manage Global S3 Configurations using zms3config CLI

In a previous blog we introduced Zimbra’s new Storage Management, in this article we introduce you to zms3config a command line application that allows you to manage Zimbra’s S3 configuration. The zms3config is the CLI utility to manage the Global S3 buckets which can be shared across mailstore nodes. Bucket configurations can be created from any node […]

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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 […]

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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>. […]

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ChatGPT knows the Zimbra API’s

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 […]

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