Is 4itworks.com valid?

Domain: 4itworks.com

Valid: Yes

This domain is valid and should be able to receive e-mail.

Tested MX: 4itworks-com.mail.eo.outlook.com (52.101.8.44)

Using MX pointer 4itworks-com.mail.eo.outlook.com from DNS with priority: 0

Block: No

You do not need to block this domain for signups/registrations.

Disposable: No

This does not look like a temporary/disposable e-mail domain.

Raw API reason:

Heuristics: WM1

START USING FREE API