Is letterlock.eu valid?

Domain: letterlock.eu

Valid: Yes

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

Tested MX: mxext3.mailbox.org (80.241.60.216)

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Using MX pointer mxext3.mailbox.org from DNS with priority: 10

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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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