domain report
Is mail123.online a disposable email?
Yes. mail123.online 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
- —
- DMARC policy
- None
| Priority | MX host |
|---|---|
| 10 | mail123.online |
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 mail123.online 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). mail123.online receives mail through mail123.online.
Questions about mail123.online
Is mail123.online a disposable email domain?
Yes. mail123.online is on the isBusinessEmail disposable list, so a check returns category "disposable" and the recommendation "block".
Should I block mail123.online 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 mail123.online receive email?
mail123.online receives mail through mail123.online.
How do I detect addresses like mail123.online 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.