If you want a fully functioning mailbox that you can treat as temporary:
Offers a "Forever Free" plan for up to 5 users on one custom domain. create temporary email with custom domain
While free temporary email services are quick, they have major drawbacks that a custom domain solves: If you want a fully functioning mailbox that
Even a disposable alias looks more credible when it ends in @yourname.com rather than @sharklasers.com . create temporary email with custom domain