There Is No Single Standard Lifespan
Temp mail lifespan varies by provider and by design choice, not by any universal rule. Some services fix a hard countdown — 10 minutes is a common default among competitors — while others, including tempmail, tie the inbox to the length of the active browser session instead, with no fixed countdown at all.
What Determines Lifespan
- Session-based services — the address stays active as long as the browser tab remains open; closing the tab ends the session.
- Fixed-timer services — the address expires after a set period (commonly 10 minutes to a few hours) regardless of whether the tab is still open, often with a manual extension option.
- Custom/password-protected addresses — persist independently of any timer, as long as the same address is reused; see temp mail with password for how this works.
What Happens When an Address Expires
Once an address expires or the session ends, its messages are deleted and cannot be recovered — there is no archive or backup behind a temp mail inbox by design. This is intentional: the entire value of a disposable address depends on it genuinely disappearing rather than quietly persisting as a data liability.
Extending or Reopening an Inbox
For an address that needs to survive longer than a single session — a multi-day trial, a delayed confirmation email, or a project spanning several sittings — see how to reuse a temp mail address, which covers the custom-address approach that avoids the standard session-based expiry entirely.
Frequently Asked Questions
Does closing the browser always delete the inbox?
For a session-based address, yes. For a custom/password-protected address, no — that address can be reopened later by returning to the same username and domain.
Can an expired inbox be recovered?
No. Once an address expires, its messages are deleted permanently and there is no recovery mechanism — a new address must be generated for any further need.