Is guaymas.son.mx valid?

Domain: guaymas.son.mx

Valid: Yes, but should be blocked

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

Tested MX: mail.son.mx (168.235.104.192)

USE THE API, DO NOT SCRAPE THIS DATA

Using MX pointer mail.son.mx 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.

Raw API reason:

Anomalies detected

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