Legal
Acceptable Use Policy
What the MailThreatZero service may and may not be used for.
Last updated 2026-08-06.
Intended use
MailThreatZero filters inbound email for domains you are authorized to administer, and relays it to a destination mail server you control or are authorized to deliver to.
Not permitted
- Adding a domain you are not authorized to route mail for.
- Using the gateway to relay outbound or third-party mail — it is an inbound filtering service.
- Attempting to access another tenant's data, or to bypass tenant isolation or access controls.
- Security testing against the production service without prior written arrangement. Report findings under the disclosure policy instead.
- Deliberately submitting malware to the gateway other than standard test files such as EICAR and GTUBE.
- Using the service to store or process content unlawfully.
Enforcement
Where use threatens the service or other tenants we may suspend the affected domain, and will tell you why. We would rather contact you first, and will where the situation allows.
Reporting abuse
Report abuse of the service, or mail you believe was wrongly delivered or held, through the contact form.
