Once Email official documentation · v1
Privacy and security
Privacy and security: Authoritative product and developer guidance for receiving temporary email, troubleshooting delivery, and testing authorized email flows safely.
Reviewed 15 August 2026
What you can do
Privacy and security: Authoritative product and developer guidance for receiving temporary email, troubleshooting delivery, and testing authorized email flows safely. Account history does not store message bodies, attachments, or a complete mailbox history. Verify the current page version and follow the linked next step; never infer a capability from a screenshot, old article, or package name.
Failures and recovery
Privacy and security: Authoritative product and developer guidance for receiving temporary email, troubleshooting delivery, and testing authorized email flows safely. Email, body, attachment, OTP, Token, API Key, tool input, and full query parameters must not enter ads, analytics, or ordinary logs. Verify the current page version and follow the linked next step; never infer a capability from a screenshot, old article, or package name.
Security and limits
Privacy and security: Authoritative product and developer guidance for receiving temporary email, troubleshooting delivery, and testing authorized email flows safely. No service can promise absolute anonymity, absolute security, guaranteed delivery, permanent availability, or harmless attachments. Verify the current page version and follow the linked next step; never infer a capability from a screenshot, old article, or package name.