Inboxes act as 10 moment mail and expire immediately after a while. They're also absolutely general public so tend not to rely on them for sensitive data. For long term inboxes which have been private and controllable with code and tests make a free MailSlurp account. I found this services https://temporary-email-generator69134.blog2freedom.com/28646353/manual-article-review-is-required-for-this-article