SoulRealiS

There is no excuse for looking unprofessional by using generic email addresses (yahoo, gmail, etc.) for your business.  You should use your own domain email address.  Many domain registrars will give you email for free with your domain registration and should have POP or IMAP implemented so you can access that email via desktop email clients (such as Outlook Express, Thunderbird, Apple Mail, etc.).  But if you need more space or have other needs that your registrar does not provide, there are also other solutions for you to review (Zoho, Google Apps, Microsoft Office Live Small Business).

You can look into Google Apps and Microsoft Office Live Small Business to get a free website using your own domain.  Don't be fooled by others that give you free websites but are simply redirecting your domain to theirs.  Or worse, there are those that put huge banner ads on your site.  Both cases cause you to lose that professional look and potential clients. 

And for those that need a more complex site beyond what those services provide, there are hosting plans from many providers that will suit your needs with prices starting as low as $5 per month.