This page describes how to set up you email client for using our mail service.

Mail server

Our mail server is:, this server can be reached by


Thunderbird config works on Windows, Linux and Macs. Latest Versions of Thunderbird come with integrated Lightning, so you can also subscribe to Calendars by installing this add-on:

Configuring Email

Please make sure you use as your Email address and your ISTuser as the Username.

Normal password is sufficient here, as the connection to the server is already secured by SSL – for either IMAPS and SMTP.

Using the Calendar

Download the latest release from, and install it as an Extension to your Thunderbird.

A restart of Thunderbird is necessary.

Having all contacts

To access your Address Book and also to all IST E-Mail addresses, open the Address Book in Thunderbird.