Web Mail Allows you to send and check your Email by logging in to a user-friendly web-based interface. This can be particularly useful when away from your home or office. This feature allows you to safely access your mail from anywhere you can access the web, without needing to install or reconfigure a dedicated Email program. All you need is a computer connected to the Internet and a web browser.

One thing to be aware of is that when Emails are "deleted" from within Web Mail they are actually moved into the Trash folder rather than being deleted outright. Also, when Emails are sent from Web Mail, a copy will be kept in the Sent folder. In order to avoid gradually running out of account space, you will need to delete the older Emails from both your Web Mail Inbox and Sent folder, as well as clearing out your Web Mail Trash folder, from time to time. The Trash folder can be emptied by clicking the Empty Trash icon, represented by a picture of a dustbin.

Setting Preferences.

Open Webmail 

hit the blue cog icon 10th icon from left on toolbar.

then click double envelope icon 2nd from left in toolbar.

double click the email address you want to modify and it appears in the box, change it in the box, click add/modify, email appears in list, scroll down and click back to user preferences.

select email at from line, scroll down select save click it, you've now changed your preferences. 

For more information see the manual & forums at Webmail site.Click for Help