I recently logged into the Admin mail account of a Zimbra mail server I manage to see if there was anything noticeable to look at. It’s not an account I …
Zimbra – Upgrading SSL certificates after Let’s Encrypt DST Root CA X3 expiration
On September 30, 2021, the Let’s Encrypt DST Root CA X3 certificate expired. This certificate was used to sign all SSL certificates generated by Let’s Encrypt. To avoid serious problems, …
“User unknown in virtual alias table” Error in Postfix and Virtualmin
I recently came accross a strange issue with Postfix and Virtualmin on every website hosted on my server when someone tried to send a mail using a contact form. The …
Zimbra Collaboration 8.6 – DNSMasq
In the previous articles we saw what Zimbra is and how to prepare the server with the necessary prerequisites to install it. We will now finish with these prerequisites by …
Zimbra Collaboration 8.6 – Prerequisites
As I explained in my first entry about Zimbra Collaboration, I’m going to dedicate a few articles to explain its prerequisites, installation and configuration, and to continue with this series, I’m …