Installing and Configuring Mozilla Thunderbird

Mozilla Thunderbird is an e-mail program to send and receive e-mails. It is a free alternative to Microsoft Outlook.

How do I install Thunderbird on my computer?

Before you install Thunderbird, you need to download the installation file from the official Thunderbird project website.

Please use only the following links or go to the official website to download Thunderbird. Downloading the program from other sources is always risky since malware might be installed on your computer.

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If the University IT has performed the initial setup of your computer, you can start Thunderbird by clicking on the desktop link or via the start menu.

Doubleclicking on the installation file will open the Thunderbird installation program. Click “Next”.

The “standard setup type” does not have to be changed. You can confirm all other dialogs. After the program has been installed, Thunderbird will automatically start.

How can I add my e-mail account to Thunderbird?

When you start Thunderbird for the first time, the following dialog will guide you through the setup of the first e-mail account:

Please replace the part with the pointed brackets with your personal Uni-ID. The suffix after the @ of the e-mail address may differ, as it depends on the status of your Uni-ID. If you do not know which e-mail aliases have been registered for you, you can go to the user administration and check your e-mail addresses there.

By clicking “Continue”, Thunderbird will automatically search for the correct server settings.

Under “Protocols”, please select “IMAP”. 

After the search is finished, please select “Manual configuration....”.

Please adjust the settings as shown in the following screenshot. Indicating the correct port and the SSL protocol used is particularly important.

IMAP Settings for Horde

IMAP server (incoming server/incoming e-mails):
Staff members:

1You are a professor and the information above does not help?
  Please try:

SMTP server (outgoing server/outgoing e-mails):

You are a professor and the information above does not help?
Please try:

IMAP port: 993
Encryption: SSL/TLS

SMTP port: 465
Encryption: SSL/TLS

Authentication (incoming and outgoing e-mail server): Password, normal
User name (incoming and outgoing e-mail server): Your Uni-ID without (at)

Click on the button which indicates that you are done and Thunderbird will save the configuration.

If Thunderbird is not yet the standard e-mail program on your computer, the following window will appear. Please confirm by clicking on “Set as standard”.

If you want to make further adjustments, for example setting up an e-mail signature, please select the symbol marked in the screenshot at the right side of the display and select “account settings” in the menu.