Email Domains Starting with O - Page 522
Search email domains by risk status
Search and browse email domains classified by RiskMail. Identify temporary/disposable domains and safe email providers.
Explore domain risk signals used by the RiskMail API
The RiskMail domain directory is a public reference for email domains we have classified. Every entry is one of two states: Temporary / Disposable (a known throwaway-mail provider) or Safe (a free public email provider, a regular business domain with valid mail infrastructure, or a domain we have not yet seen disposable signals for).
If you operate a signup or login flow, this list is a starting point — disposable providers come and go faster than any static list can track. The RiskMail API reflects the live database in real time and returns a clean verdict: disposable | safe for each request.
See something missing or misclassified? Tell us and we'll re-evaluate the domain.