Try dracMail

The username and password for the demo account are:

Username: demo@dracmail.net
Password: demo

You can access the latest version here: demo.dracmail.net.

NOTES: To access the demo installation your browser must allow Cookies and have JavaScript enabled.
  The current demo version is 0.2 which can be downloaded here: https://sourceforge.net/projects/dracmail/files/beta/.
  Emails can only be sent to demo [at] dracmail.net.