You can log into Ultimate Email by navigating to https://www.uwwweb.com/webmail . If you're not logged in, you will have to do so. This page will redirect you to a listing of all your Ultimate Email products. Click on the "View (domain name) Webmail" button and you will be directed to the webmail. Log into this page using your email username and password.
Alternatively, you can type in webmail.(domain name) into your browser.