domain report
Is cloud99.top a disposable email?
Yes. cloud99.top is a disposable email domain: a throwaway inbox service.
Disposable inbox — it will stop receiving mail soon.
- category
- disposable
- recommendation
- block
- confidence
- 97%
- Google Workspace: not detected
- Microsoft 365: not detected
Mail setup
- Receives mail
- Yes
- Mail provider
- —
- SPF
- v=spf1 +a +mx -all
- DMARC policy
- None
| Priority | MX host |
|---|---|
| 0 | em4.mainnetmail.com |
| 0 | mx4.mainnetmail.com |
Workspace
- Google WorkspaceNot detected
- Microsoft 365Not detected
Detected per company domain from public DNS and Microsoft's documented tenant discovery — never per person.
Why this verdict
Confidence 97% · recommendation block under the default b2b policy.
What this means
Addresses at cloud99.top are created in seconds without sign-up and are usually abandoned soon after. They are used to get past email verification, claim free trials more than once or avoid follow-up email. It is on our disposable email domains list.
isBusinessEmail returns category "disposable" and recommends block under every policy (b2b, strict and lenient). cloud99.top receives mail through em4.mainnetmail.com, mx4.mainnetmail.com.
Questions about cloud99.top
Is cloud99.top a disposable email domain?
Yes. cloud99.top is on the isBusinessEmail disposable list, so a check returns category "disposable" and the recommendation "block".
Should I block cloud99.top at sign-up?
For most products, yes: a disposable inbox stops receiving mail soon, so you can't reach the user later. isBusinessEmail recommends block under all three policies.
Can cloud99.top receive email?
cloud99.top receives mail through em4.mainnetmail.com, mx4.mainnetmail.com.
How do I detect addresses like cloud99.top automatically?
Call POST /v1/check with the address or domain. Disposable domains come back with is_disposable: true, from a list merged from open sources and our own detection and updated daily.