Is there a way to show the email and calendar tab for custom records?

I have a custom object defined, and it has an email field. I would love to see the email and calendar tabs for this object (as well as the people object). But, even after adding an emails field, the tabs don't appear. Is there any way to activate that functionality?

I am running self-hosted at version v1.0.3.

P.S. I love Twenty, it's awesome!