Is mail4.online valid?

Domain: mail4.online

Valid: Yes, but should be blocked

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

Tested MX: ereg4.brushemail.com (146.190.78.248)

Using MX pointer ereg4.brushemail.com from DNS with priority: 0

Block: Yes

You should block this domain for signups/registrations.

Disposable: Yes

This looks like a temporary/disposable e-mail domain.

Detection method: Advanced heuristics

This domain was blocked heuristically. Unknown domains are automatically analyzed and tagged with our advanced algorithms.

Raw API reason:

Heuristics x4

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