Is sellback.com.br valid?

Domain: sellback.com.br

Valid: Yes

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

Tested MX: aspmx.l.google.com (64.233.166.27)

Using MX pointer aspmx.l.google.com from DNS with priority: 1

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.

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Raw API reason:

Heuristics: WM1

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