Mozilla Thunderbird – Zimbra

The instructions below are for setting up Mozilla Thunderbird to access the Zimbra e-mail system.


Step 1: Download Mozilla Thunderbird.  It is available for free from Mozilla’s website:

Step 2: Install the program using the default settings.

Step 3: When you run the program for the first time, it may ask you if you want to get a new email address.  Instead, click Skip this and use my existing email.

Step 4: Enter your name, email address (as, not, and password and click Continue.



Step 5: Click Manual Config since the automatically detected info will be incorrect.

Step 6: Set both the Incoming and Outgoing server hostname to  Set the Incoming Port to 143 and the Outgoing Port to 587.  Set SSL for both incoming and outgoing to STARTTLS.  Set Authentication to Normal Password.  See the image below for an example of the complete setup.


Click Done when finished.