If you are getting your Email hosting through Piggybank Webhosting, then you have webmail already built-in. Webmail is handy if you have a problem with your computer or you are away from your computer, and you still need to get to your email. Keep in mind, anything you send/delete from webmail, will not show up in Outlook (or any other email program), they are basically duplicated, independent systems.
To access it, go to www.yourwebsite.com/webmail
You will see a login screen
Fill in your email address and password
Then you'll have the choice of 2 programs:
Roundcube is generally the most preferred, but you can choose either.
Once you're into your email account, it works a lot like any other email program to get and send email.
From here, you can also create autoresponders.