Is 1zs.cz valid?

Domain: 1zs.cz

Valid: Yes, but should be blocked

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

Tested MX: mail.redirect.host (88.99.210.161)

Using MX pointer mail.redirect.host from DNS with priority: 10

Block: Yes

You should block this domain for signups/registrations.

Disposable: No

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

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Raw API reason:

Heuristics: T1

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