How to stop non work emails registering for webinar

[Webinarsemcs]

Hi, 

I'd like to stop registrants for upcoming webinar using Gmail or Yahoo accounts. We only want company emails. Is there a way to toggle this on ? 

[colegs]

There is no way to dynamically require a company email.  The only options you would have is to not automatically approve registrations so you can reject those, and you can exclude specific email domains such as Gmail or Yahoo by updating your meeting settings and block those specific domains.