In this article you will learn how to set-up Zimbra on Google Workspaces. Google Workspaces serves as a SAML Identity Provider (IdP) and Zimbra will be a SAML Service Provider (SP). The technology used in this article is SAML, an open standard for Single Sign-On. When using SAML an Identity Provider (IdP) will take care […]
Author Archive | Barry de Graaff
Per user attachment size limits
Zimbra Postfix can be configured to use Postfwd. Postfwd can be seen as a firewall for Postfix and it allows the creation of rulesets to implement email restrictions. A new Admin UI Zimlet and extension leverage Postfwd to configure per user attachment size limits. More information and download is available on the Per user attachment […]
Image in email signature Zimlet
A new Zimlet is released that adds a button in the compose field in Settings->Signatures which allows the user to add images in email signatures. You can download the Image in E-mail Zimlet via the Zimlet Gallery and then deploy it as usual with zmzimletctl deploy zimbra-zimlet-signature-image.zip
A Milter for using Spamhaus HBL with Zimbra Postfix
In this article you will learn how to use Spamhaus Hash Blocklist (HBL) to improve email protection in Zimbra. For a long time administrators of Zimbra have relied on Spamhaus to fight incoming spam by configuring Postfix using traditional blacklists. These traditional blocklists work by blocking IP (ranges) and domains of known spammers. When an […]
Improve email Zimbra protection with Spamhaus HBL
In this article you will learn how to use Spamhaus Hash Blocklist (HBL) to improve email protection in Zimbra. For a long time administrators of Zimbra have relied on Spamhaus to fight incoming spam by configuring Postfix using traditional blacklists. These traditional blocklists work by blocking IP (ranges) and domains of known spammers. When an […]
Setting up DNS before installing Zimbra
DNS is an important aspect of any Zimbra installation. This article will help those that are new on installing Zimbra to get an idea what needs to be configured to get started. There will also be some tips and best practices that will improve security and email deliverability that may be lesser know even to […]