@daniella09:
Many of our users, including myself, have had great experience with Google Apps, and we have full instructions on using it to host your custom domain email:
http://en.support.wordpress.com/domain-mapping/add-email/
That would be my recommendation.
If you want to use GoDaddy for your email, you can sign up for email hosting through them, and follow these instructions:
http://en.support.wordpress.com/domain-mapping/add-email/
I'm sorry for the frustration, but we can't offer support for BlueHost's email hosting.
Let me know if there's anything else we can assist with! :-)