temporary email time limit 3

https://onetimesignupemailzone.stonefielddigest.com/posts/why-a-one-time-signup-email-is-your-best-privacy-tool-online

Most temporary email addresses have a time limit, usually between 10 minutes and a few hours, after which the inbox and address self-destruct. I've tested several services, and the countdown timer is always ticking—be prepared to finish your sign-up or verification before time runs out.