Inbucket is an email testing service; it will accept email for any email address and make it available to view without a password.

To view messages for a particular address, enter the username portion of the address into the box on the upper right and click View.

This message can be customized by editing ui/greeting.html. Set the INBUCKET_WEB_GREETINGFILE environment variable if you'd like to move the file outside of the Inbucket installation directory.