Any idea where I can configure from which e-mail address the website tries to send the contact form e-mail?

I have a different domain (the company domain) from which I send emails vs the odoo hosting domain. Sending emails when using email templates is working perfectly.

On the website contact form however, I can't find where to set configure the from e-mail address. I can't find it in the e-mail templates nor in the settings of the contact form (submit) itself. I can only configure an address to which the emails are sent, not one from which they are sent.

The current behaviour is that they are sent from , which is of course non existing and hence they don't get sent.

Anyone an idea on how to solve this?