HideMail.app by George Daneke

Say goodbye to spam. Create a random permanent address with HideMail that forwards to your current email inbox. It is the easiest way to protect your accounts from hackers without giving up your real email address

Gives you unique, random email addresses that are forwarded to you when you want to keep private your personal email

HideMail gives you unique, random email addresses (or "aliases") that are forwarded to your primary e-mail account when you want your personal email address to remain private. Additionally, these email addresses can be easily deactivated at any given time, effectively blocking unwanted emails from reaching your inbox. Whether you're signing up for a new service or just want to keep your personal email private, Hide My Email has you covered.

A random email address can now be generated for each new account, just like a password. Because email is often caught in database dumps and leaks, and while a password can be easily changed, an email address is difficult to change across all sites where it has been used. This is no longer a problem!