Sometimes you may wish to be able to change a POP account's password without having access to ServerTools. The prime example would be someone else having an email account on your domain but you don't trust them with full access to your account's back end.
In those cases you can send them to your domain and then
/cgi-tools/changepass. So, for example, if your domain were sampledomain.com then the address would be <http://www.sampledomain.com/cgi-tools/changepass>.