Exit your web-browser after using WWW-Mail or somebody else may be able to access your mailbox and discover your password.
Do not use any WWW-Mail running on an untrusted server as whoever installed it may have changed it so that he/she can extract your password.
You should only use WWW-Mail through http to servers where you would not hesitate to use telnet or ftp. You should only use WWW-Mail on a remote server over an untrusted network through secure protocols like https and shttp).
