Is houstonzoo.org valid?

Domain: houstonzoo.org

Valid: Yes

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

Tested MX: usb-smtp-inbound-2.mimecast.com (170.10.150.242)

Using MX pointer usb-smtp-inbound-2.mimecast.com 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:

USE THE API, DO NOT SCRAPE THIS DATA

Heuristics: WM1

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