Temporary email is designed to disappear. Understanding exactly what happens when an inbox expires helps you use it appropriately and avoid situations where expiration causes problems.
The expiration process
- Timer reaches zero. Each inbox has a fixed expiration time (typically 30-60 minutes). When this timer reaches zero, the inbox is marked as expired.
- Address is invalidated. The random local part (the part before the @) is removed from the list of active inboxes. The address no longer matches incoming mail.
- Messages are deleted. All stored messages and their attachments are permanently deleted from the server. This is not a soft delete — the data is removed and cannot be recovered.
- Access token is invalidated. The browser session token that allowed you to view the inbox is invalidated. Even if you kept the tab open, you can no longer access the inbox.
- Incoming mail is discarded. Any mail sent to the expired address after expiration is accepted at the MX level but discarded during processing because no active inbox matches the recipient.
What gets deleted
Message content: The complete message body, including both plain-text and HTML versions.
Attachments: Any files attached to messages are deleted along with the messages. There is no separate attachment storage.
Metadata: Subject lines, sender addresses, timestamps, and all other message metadata are deleted.
Access logs: Records of which browser session accessed which inbox are deleted as part of the cleanup process.
What remains
Nothing user-accessible. From the user's perspective, the inbox simply ceases to exist. There is no archive, no backup, and no recovery mechanism.
Service logs: The service may retain anonymised aggregate logs for operational purposes (delivery statistics, abuse detection), but these cannot be used to recover individual messages or inboxes.
Account recovery implications
When you use temporary email for an account and the inbox expires, you lose the recovery path. If you need to reset the password later, the reset email will be sent to an address that no longer exists. The account becomes permanently inaccessible unless the service offers an alternative recovery method (phone number, security questions, etc.).
This is why temporary email should never be used for accounts you intend to keep. The convenience during signup becomes a permanent problem during recovery.
Timing considerations
Most temporary email services provide countdown timers so you can see exactly when the inbox will expire. For verification codes and one-time interactions, the typical 30-60 minute window is more than sufficient. For ongoing use, you must either generate a fresh address before expiration or switch to a more permanent solution.