Is opto-system.co.jp valid?

Domain: opto-system.co.jp

Valid: Yes

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

Tested MX: dmail.kagoya.net (210.134.58.254)

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Using MX pointer dmail.kagoya.net from DNS with priority: 10

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.

DO NOT SCRAPE THIS DATA, USE THE API

Raw API reason:

Heuristics: WM1

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