Here's the guide for different versions of Outlook directly from Microsoft: https://support.microsoft.com/en-us/office/manage-email-messages-by-using-rules-in-outlook-c24f5dea-9465-4df4-ad17-a50704d66c59
You now need to follow this guide, and in the step where you define the rule for moving messages, you can enter info@singlecase.cz as the "from" and create a new folder, for example, "SC Messages."
After confirming or saving the rule, all incoming email messages from info@singlecase.cz will then be automatically moved to the SC Messages folder.
Of course, this is also possible in Outlook for Mac; this option is hidden under the menu: Outlook - Preferences - Rules.