Transport Layer Security (TLS) encrypts data sent over the Internet to ensure that eavesdroppers and hackers are unable to see what you transmit which is particularly useful for private and sensitive information such as passwords, credit card numbers, and personal correspondence. (further reading: https://www.internetsociety.org/deploy360/tls/basics) In this article you will learn how to configure Zimbra to […]
Archive | PowerTips – Admins
Zimbra SkillZ: Enhance Performance Using SSDB on Zimbra
Hello Zimbra Customers, Partners & Friends, Zimbra traditionally stores Authentication Tokens, CSRF Tokens and log-on timestamps to LDAP. On Zimbra systems with a large number of active users, this increases the load on the LDAP server, which can cause LDAP responses to slow down. Zimbra supports storing short-lived data (aka ephemeral data) to a separate […]
Zimbra SkillZ: How to Use SPF, DKIM and DMARC on Zimbra
Hi Zimbra Customers, Partners & Friends, This blog is a short “how-to” for setting up SPF, DKIM and DMARC on Zimbra. What is SPF? Sender Policy Framework (SPF) helps prevent email spamming and spoofing by telling the world what servers are allowed to send email from your domain. If an email is sent from user@example.com, […]
Zimbra SkillZ: Using Sieve Filters on Zimbra
By Barry de Graaff on July 14, 2021 in Product News, Did You Know, PowerTips – Admins, Zimbra Web Client
Hi Zimbra Customers, Partners & Friends, Sieve is a powerful scripting language for filtering incoming email messages. This blog is a short how-to for using sieve filters on Zimbra webmail. Zimbra supports incoming email filters set by users, but administrators should set up and install sieve filters. First, allow adding email headers to help debug […]
Zimbra SkillZ: Partial Sync for ZCO is Here!
By Gayle Billat on March 17, 2021 in Product News, Open Source, Partners, PowerTips – Admins, Product Updates, Zimbra Web Client
By Popular Demand – ZCO Partial Sync is Here! Happy Days for ZCO Power Users Hello Zimbra Partners, Customers & Friends, Many Zimbra Partners and customers have requested partial sync for ZCO (Zimbra Connector for Outlook) … and it’s here! Are you a ZCO power user? Are your customers or users? Now power users can […]
Zimbra SkillZ: Add a Custom Python 3 Milter to Zimbra! Part 3 of the Zimbra Open Core Series
By Barry de Graaff on March 4, 2021 in Product News, Community, Did You Know, Partners, PowerTips – Admins, Zimbra Server
Hi Zimbra Partners, Customers & Friends, Today I will show you how to create an extension to Postfix. By implementing a Milter (an email extension protocol), you can create an extension that receives events whenever an email is sent or received. Your custom Milter extension can have event handlers for: SMTP events (CONNECT, DISCONNECT) SMTP […]