In this module you can see the current settings for the emails which are sent out and you can edit them as you wish.
Activating the module Email configuration
Log into your bookingkit account at https://eu5.bookingkit.de/ and activate with one click the module “Email configuration” in settings → modules → Email configuration.
In Settings → Email Configuration you can determine when you will receive the emails and which emails should be sent to the customer. Simply click on “yes” if you wish to activate the email which should be sent out. In addition you may also set, that all your email-correspondence with your endcustomers will be send from your own email-adress (the one that is listed under Account > Company Data > General Information) instead of firstname.lastname@example.org. In order to use that feature just activate "Allow direct reply to sent emails".