email validation

[sluc69]

With the continuing Ukraine-Russia war, hackers are trying to create havoc on western websites, creating accounts with non-existing email addresses.
Some sites offer limited quotas for free. Some are free unlimited. Not sure if they are as good as they advertise; some exaples:
https://verif.email/en/api-documentation/
https://dev.me/products/email
Is there a possibility to integrate a feature like this?