Is sina.com.cn valid?

Domain: sina.com.cn

Valid: Yes

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

Tested MX: freemx1.sinamail.sina.com.cn (49.7.36.189)

DO NOT SCRAPE THIS DATA, USE THE API

Using MX pointer freemx1.sinamail.sina.com.cn 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.

Raw API reason:

USE THE API, DO NOT SCRAPE THIS DATA

Heuristics: WM1

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