Real-time email validation question

Hello.

I just found your plugin and I would like to ask the following regarding your feature Real-time email validation.

Our website, uses Ninja forms and some other custom html forms. Will your Real-time email validation feature work for both? I saw in the description that you can cover Ninja forms but what about the custom ones? Do you provide any documentation that we could use to enable that feature for the custom ones?

Thanks in advance,

George.