Once Email official documentation · v1

Getting started

Getting started: 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

Getting started: Authoritative product and developer guidance for receiving temporary email, troubleshooting delivery, and testing authorized email flows safely. Once Email receives email only; it cannot send, reply, forward, or provide SMS codes. 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

Getting started: Authoritative product and developer guidance for receiving temporary email, troubleshooting delivery, and testing authorized email flows safely. Choose 10 minutes, 1 hour, or 24 hours before creation; refresh does not extend expiry. 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

Getting started: Authoritative product and developer guidance for receiving temporary email, troubleshooting delivery, and testing authorized email flows safely. Use temporary inboxes only for low-risk mail and never for recovery, finance, health, or irreplaceable accounts. Verify the current page version and follow the linked next step; never infer a capability from a screenshot, old article, or package name.