Where do I configure a bespoke email domain?

In order to change the email domain that the emails sent from the platform are sent from, first go to the Email Settings section shown below. 

You will be offered the option to add a new email setting:

By clicking into this option, you will be offered the option to create a new email setting:

The email settings fields should be completed with your internal email details. Your IT technician 
should be able to provide the needed information for this section.
Clicking the Test Email button will send a test email to your username (the one you are logged into the platform with) so you can check it is coming from the desired address.

Email domain settings sit at the Business Unit level, meaning that you can configure a domain for each Business Unit, if you wish to. 
If you are using Business Units and wish to add an additional email setting, navigate to the Business Unit management page from the Home Screen, once you have created all the desired email domains following the process outlined above.