Top level domain restriction

Hello,

I know plugin is created for other purpose, but…Is there a way how to allow emails just by TLD?

• .com
• .cz
• .eu

So any adress with ending on .com will be allowed, for example @hotmail.com @gmail.com or @seznam.cz @email.cz

My website is spammed by many other TLD email registrations and I know, I’m just targetting local customers.

I tried to use wildcart *.com, but it’s not a way it let me use plugin how I wonder.

Thank you for answer.