Is stu.mw.k12.ny.us valid?

Domain: stu.mw.k12.ny.us

Valid: Yes

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

Tested MX: mx1.hc4436-3.iphmx.com (207.54.85.90)

Using MX pointer mx1.hc4436-3.iphmx.com from DNS with priority: 100

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:

USE THE API, DO NOT SCRAPE THIS DATA

Heuristics: WM1

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