what error message do you receive?

No error message, it looks like it sent but is never received.

what mail provider are you using? These sorts of issues are usually found on mail accounts on personal/business mail servers on Dynamic IP addresses, IP addresses on a spam blacklist and incomplete DNS records.

Bluehost.com is my email provider.

Have you updated the MX entries in the DNS record for your domain?

Also go here http://www.dnsstuff.com/ plug in your domain and see what they have to say about it.

I am sorry, but I don't know what any of that means. Where would i find MX entries?

Your domain is hosted with bluehost. For web surfers to find your domain it has a DNS entry. That DNS entry has an MX record that advertises to the web the authorized mail exchanger for the domain. DNS configuration is not simple, it is complex and incorrect syntax will invalidate things. There is usually no syntax checker , it is a simple text file with complex entries and syntax rules

Did you go to the site I pointed you to, to put in your domain name? I do suggest you do so, then contact your hosting provider for assistance with whatever they identify, but the MX will be one I think as all those site drop mail from domains without a valid MX record as SPAM.