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.
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Trouble logging in? Simply enter your email address OR username in order to reset your password.
For faster and more reliable delivery, add email@example.com to your trusted senders list in your email software.