On the website, you can create any number of randomly generated mail addresses. In contrast to the alternatives mentioned, this one is linked to your correct email address. This has the advantage that incoming emails are automatically forwarded to your inbox. In this way it is also possible to answer e-mails: For this purpose, a further random address is generated for each forwarded e-mail, which is then used when answering and is only valid once. If you no longer need a generated email address or if emails are forwarded, you will find a link in every forwarded email, which you can use to unlink the link with your real email address — then all emails wander in digital nirvana.
altmails takes a slightly different route than the usual temp mail providers. It is emphasized that your data will not be passed on. Incoming and forwarded emails are not saved on the server, which means that deleted emails cannot be restored. At the moment the service is completely free of charge, one or the other paid premium feature is planned for the future, which will then also finance the service. Always important to know if you are to trust a free service. I find it very interesting for some application purposes and if you prefer to use classic disposable mail, you can use TempMail as an alternative service.