Simply enter your website name followed by "/mewebmail" in your browser.
Log into webmail using the email address of the desired account that you wish to check. Enter your password and you're logged in!
Step 3
You are now viewing your mail on the server - before it gets delivered to your PC. You are capable of sending, receiving, deleting mail etc.
Remember that any email your PC receives will be removed from your webmail. Similarly, emails sent via webmail will not show up in your PC's sent folder.