Email suffix codeshare

You're looking for email suffix codeshare!

Here are some common email suffix codeshare:

@gmail.com: Google's free email service, widely used.
@yahoo.com: Yahoo's free email service, popular in the early 2000s.
@hotmail.com: Microsoft's free email service, launched in 1997.
@outlook.com: Microsoft's free email service, launched in 2012.
@aol.com: America Online's email service, popular in the 1990s and early 2000s.
@protonmail.com: A secure, privacy-focused email service.
@tutanota.com: A secure, privacy-focused email service.
@icloud.com: Apple's email service, integrated with iCloud storage.
@live.com: Microsoft's free email service, launched in 2007.
@msn.com: Microsoft's free email service, launched in 1995.

These are just a few examples of the many email suffix codeshare available.