Hello *nixer,
http://www.yopmail.com/en/
http://www.filzmail.com/
http://www.disposableinbox.com/
http://inbox.si/
http://mailcatch.com/en/disposable-email
http://www.mailinator.com/
http://www.fakeinbox.com/
http://www.tempinbox.com/
http://deadaddress.com/
I really like Yopmail; it's free and public.
When I say public, I mean that it doesn't even require a password for you to login into an account.
"Seems fishy", you might say.
Yopmail is useful because it's a garbage, fast creation email.
You can easily make a little bot that uses yopmail to retrieve emails after signing up on a website.
Or, you can also have fun looking at other people's junk while taking a huge shit in the bathroom.

Toilet reading is always intertaining.