Is extern.tu-freiberg.de valid?

Domain: extern.tu-freiberg.de

Valid: Yes

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

Tested MX: mailgateway.hrz.tu-freiberg.de (139.20.200.175)

Using MX pointer mailgateway.hrz.tu-freiberg.de from DNS with priority: 5

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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:

Heuristics: WM1

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