In this article, I will show you how to add a new domain in Zimbra admin. For most mail system administrators, they can do this through the command line. But Zimbra provides us with a user interface to do that, so let’s use it. Steps to add a new domain in Zimbra admin The system

Zimbra unable to start TLS: hostname verification failed. Have you ever faced this error. Its full content is “Unable to start TLS: hostname verification failed when connecting to ldap master.” This error occurs when you install multiple SSL certificates for multiple domains in Zimbra mail system. Recommended Reading: Install Let’s Encrypt certificate for new domain in

Install Let’s Encrypt certificate for new domain in Zimbra. Previously, I wrote an article about using certbot-zimbra. It is used to automatically install Let’s Encrypt SSL for Zimbra mail server. With that article, you can successfully do a completely new Zimbra mail server. But when you add a new mail domain to the server, you

Zimbra block emails Virus Heuristics.Encrypted. Have you ever received notifications from users that customers cannot send mail to them. With the message “Our content checker found virus: Heuristics.Encrypted.Zip“. What is this error? Why does it happen when a customer sends you an email? How to handle it? Zimbra block encrypted archives and Heuristics.Encrypted files Zimbra

How to migrate mail data from Google GSuite to Zimbra? This article will guide you to do that. There are many tutorials on how to migrate data from Zimbra to GSuite or from Mdaemon to GSuite. But today, I have the opposite situation, I have to migrate mail data from Gsuite to Zimbra. First of

Zimbra change password redirect port 8443 to 443? Why do you need to do that? And how to do it? In Zimbra mail, when the user clicks on the Change Password menu. Another window will appear for users to change their password. Zimbra change password redirect port 8443 to 443 However, this service window runs

How to fix snx: error while loading shared libraries: libpam.so.0? If you haven’t read my previous article on how to connect Check Point VPN on a Linux computer. Chances are, you will encounter this error when installing Check Point VPN on your Linux computer. Even myself, at the first time I installed Check Point VPN

How to install Check Point VPN client in Linux? How to do this? This article will show you how to connect Check Point VPN from a Linux computer. If your company is using Check Point firewall device and you are using a Linux computer, you will have a small problem. Check Point client supports very

How to extend Linux LVM partition in AWS? Today I will show you how to do that. This is an accidental situation, a person asked me for help. He uses a CentOS server on AWS and it is full of root partition while disk space is still available. He wants me to help extend the

Fix DKIM field must be base64 encoded. In this article, I will show you how to fix this error of DKIM. If you have read the article How to check a DKIM core key record is correct that I wrote earlier. You will probably encounter the following error. What the error looks like This error