Is sector-uk.com valid?

Domain: sector-uk.com

Valid: Yes

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

Tested MX: sectoruk-com01e.mail.protection.outlook.com (52.101.68.29)

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Using MX pointer sectoruk-com01e.mail.protection.outlook.com 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:

USE THE API, DO NOT SCRAPE THIS DATA

Heuristics: WM1

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