Buy a domain name, they can be brought from less than �10 and get your email based on that... so your email address would be say:
[email protected]
it looks far more professional than using your ISP's email address for business and costs incredibly little.
have a look here, they will sell you the domain and then host it and your email for free. they are also UK based so you can talk to people whos first language is English if you need advice.
http://getdotted.com/
(I have no current connections with them but I did work for them many years ago so know they are a legit company)