There are three versions of webmail. The address for logging in to the web interface is webmail.forpsi.com on a secure protocol. When using your own domain, you will also need to use a secure protocol (https://webmail.mydomain.com) and thus agree with a certificate exception in the browser, as it is issued for the forpsi.com domain.
Trouble logging in? Simply enter your email address OR username in order to reset your password.
For faster and more reliable delivery, add st@forpsi.com to your trusted senders list in your email software.