Form Warnings: Email domain warning not available

if someone enters a wrong domain, the message we receive is "This domain is not allowed" . Is there an option where we can customize this message ?

Hi,

Unfortunately, it is not possible to customize the domain error message.

I will forward this to our developers as a feature request. Please note that we cannot provide an ETA for this. Also, we are not entirely sure if this will be implemented as it will depend on our developers workload and popularity among the users.
We will inform you here once this feature becomes available.

Thank You!