Is pkieffer.ru valid?

Domain: pkieffer.ru

Valid: Yes

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

Tested MX: mx.yandex.ru (77.88.21.249)

USE THE API, DO NOT SCRAPE THIS DATA

Using MX pointer mx.yandex.ru from DNS with priority: 0

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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