Who set up your web hosting account? That would be the same person that probably set up your email address. You're going to want to set it up as a POP account on your phone but you'll need to know incoming/outgoing server info as it pertains to your prosperitees.org account.
You may also want to consider a gmail account to manage all your email addresses. That is, if you're not a tin foil hat wearing Google-is-spying-on-me type person. HTC Radar is a windows phone though so I'm not sure how well it integrates with gmail.
Then go a step further and port your business phone number to a google voice account on your personal phone and bam, two phone numbers on one phone!
Does it display so you know it's an incoming from the Google number?
I have mine set up to show the caller id of the incoming call (not the business line number). To know if it's a google voice call, when slide the answer button it then has a voice prompt to press one to answer the call or listen in on voicemail etc. That is the way I know definitively that it's a business call. Regular calls also show caller id and answer as normal when you slide to answer.
You can also set up hours of operation for the google voice number, so after say 6pm you can send all business calls to voicemail. Additionally, you can set a "busy" checkbox if you want calls to go to voicemail for a small unscheduled portion of the day. It actually is really cool.
All voicemails are transcribed and show up in your gmail inbox where you can read or listen to them. You can log in on your computer to google voice and manage contacts, set up blocks for spam numbers, and even play a special message if you like for specific spam callers haha let your imagination go with that one.