Is sdf.org valid?

Domain: sdf.org

Valid: Yes, but should be blocked

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

Tested MX: mx.sdf.org (205.166.94.24)

Using MX pointer mx.sdf.org from DNS with priority: 50

Block: Yes

You should block this domain for signups/registrations.

Disposable: Yes

This looks like a temporary/disposable e-mail domain.

USE THE API, DO NOT SCRAPE THIS DATA

Detection method: Advanced heuristics

This domain was blocked heuristically. Unknown domains are automatically analyzed and tagged with our advanced algorithms.

Raw API reason:

Heuristics x3

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