A password reset email is not just a convenience message. For many services, it is the practical key to your account. Whoever controls the recovery inbox can often regain access even without knowing the current password.
Recovery depends on persistence
Reset links assume the address still exists. That assumption is exactly why temporary email is the wrong choice for accounts you intend to keep. Once the inbox expires, there is no mailbox to receive future reset links, security alerts or login confirmations.
Why attackers care
Attackers often target email first because it unlocks other accounts. If they control your inbox, they can request resets elsewhere. This is why your primary mailbox should have a strong unique password, multi-factor authentication and recovery options you actually maintain.
Testing reset flows
Developers should test password reset emails from the user's perspective: request the reset, inspect the link, confirm expiry, verify one-time use and check that the email does not leak unnecessary account details. Temporary email can help manual QA because it gives you a clean external inbox for each run.
When temporary email is acceptable
Use it for testing, demo accounts or services you will abandon immediately. Do not use it for banking, work, cloud storage, domains, purchases, subscriptions or anything with future value.
For a broader decision framework, read is temporary email safe.