Best Desktop Email Clients For Linux

This tutorial aims at introducing Top Modern Desktop Email Clients For Linux and macOS. I know there are lots of email clients for Linux and sometimes choosing the right one can be...

How to Configure Microsoft Outlook for Zimbra

This guide will take you through the steps to Configure Microsoft Outlook to connect to Zimbra email server for sending and receiving emails. We have some other articles on Zimbra which...

How to get Postfix Mail Statistics from Logs

This guide is intended to show you How to get Postfix Mail Statistics from Logs on your mail server. I assume you have the logs on the local Postfix server. If the...

How to Set Secure Password Policy on Zimbra

In this guide, we'll look at all the modification you need to Set Password Policy on Zimbra server. By default, Zimbra doesn't enforce any strong password requirements for a user account. This...

Managing Distribution Lists on Zimbra Mail Server

Welcome to our guide on Managing Distribution Lists on Zimbra Mail Server. Zimbra is among the most used Email collaboration systems. It has proven to be a reliable, scalable open source...
Configure whitelist and blacklist Zimbra Amavis Spam filtering

Configure whitelist and blacklist Zimbra Amavis Spam filtering

If you're on this page it means you've experienced noqueue messages on Zimbra Amavis for some emails. On this guide, I'll show you how to Configure whitelist and blacklist Zimbra Amavis Spam filtering....

Fix ERROR: zclient.IO_ERROR (invoke Connection refused, server: localhost) (cause: java.net.ConnectException Connection refused on Zimbra

Ever encountered this error " INFO: I/O exception (java.net.ConnectException) caught when processing request: Connection refused INFO: Retrying request ERROR: zclient.IO_ERROR (invoke Connection refused, server: localhost) (cause: java.net.ConnectException Connection refused)" on Zimbra. When you...

Zimbra Firewall Configuration with ufw for Ubuntu and firewalld for CentOS

In this guide, we're going to look at how to secure your Zimbra collaborative suite on CentOS 7.x and Ubuntu server using Firewalld and Ufw respectively. If your server is running...
Postfix Commands Administration Cheat Sheet

Postfix Commands Administration Cheat Sheet

Hello good people, here is a Postfix Commands Administration Cheat Sheet I made as a quick reference when administering Postfix. It contains most used postfix commands for troubleshooting problems. Postfix is...
installing postfix3 on centos 7

Installing postfix3 on CentOS 7

This guide will take you through the steps of Installing postfix3 on CentOS 7. Before diving to installation of postfix 3 on CentOS 7, let's first define what's postfix. What is Postfix? Postfix, designed by Wietse Venema,...