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Webmail FAQ

On February 13, 2026, the outdated webmail software "Horde" will be replaced by the new webmail software SOGo. With a modern and intuitive interface, SOGo offers most of the familiar Horde functionalities.

These FAQs already refer to the new webmail service SOGo!

Here you can find common problems and solutions related to email and webmail topics.

General Information

What is SOGo?

SOGo is the software that the University of Cologne’s webmail system will be migrating to in the near future. SOGo will replace Horde as the underlying system.
Where can I find the official SOGo FAQ?

Official Documentation
Who can I contact with questions or problems?

Please contact us by email, specifying your account and your inquiry: email@hrz.uni-marburg.de

Problems and Solutions

Why am I not able to subscribe to a shared calendar?

Currently, SOGo has a bug that spradically requires the owners of calenders to reinvite users, if they are not able to subsribe to the calendar.
How do I write, reply, or forward emails?

To compose a message, click the green pencil. You'll find this pencil at the bottom of the message list (orange). After you've selected whether you want to compose the email in the same or a new browser window, the sending form will open.

To forward an email, please select the corresponding icon (right arrow) in the header of the corresponding message.
How do I search emails?

Clicking the "magnifying glass" icon above the message list opens an input field that allows you to search in the currently selected folder.
How can I search in the calendar?

First, the time period filter must be set to the desired range (default: “next 7 days”) before typing text into the search field. Once you click on the magnifying glass icon, the filter for the search period is hidden!
Where are mail filters edited?

You can access the settings via the options wheel next to the name on the left side (orange).
In the settings, select “Email”. In the white main window, you can select “Filters” as a tab.
Why are my filtered emails being copied and not moved?

"End filter processing" must be added to the end of the rule for the move to occur.
Where can I add my signature?

You can access the settings via the options wheel next to your name (in the top left corner). In the settings, select "Email." In the white main window, you can select "IMAP Accounts" as a tab. Then click the pencil icon to the right of the account name. You can then set your signature in the Identities section of the corresponding account.
Where can I view my tasks?

Tasks are implemented in SOGo as a separate calendar. The task calendar is called "Username's Task List." By default, the "Events" tab is displayed. To view the task list, you can switch to the "Tasks" tab.
Why do invitations from Outlook automatically have priority 5?

In SOGo, priority levels range from 1 to 9. Invitations from Outlook automatically have priority 5 because they have no priority by default.
Filter vs. Search: Why can't I find my search results?

Filters can only be defined before entering the search form. After that, they are set and cannot be deselected. If desired search results are not displayed, a filter may be active.
Why is it not possible to display the appointment status ("Tentative", "Confirmed" or "Cancelled") in the web interface?

The SOGo web interface does not allow you to assign a status like "Confirmed," "Tentative," or "Cancelled" to an appointment. This is not due to a technical limitation of the server, but rather a deliberate design choice for the web interface. SOGo developers focus on core use cases (appointment creation, invitation management, and synchronization). Niche functions like explicitly setting status values have not yet been integrated into the web GUI because they are rarely needed in practice.

Workaround: Set status via external clients
If an explicit status is required (e.g., for tentative appointments), please use a local email program such as Thunderbird. These programs offer a choice between TENTATIVE/CONFIRMED when creating an appointment. The value is saved by SOGo, but it is still not displayed in the web interface.