One of the great things about owning the domain name for your small business website is that you have the freedom to create any email address you want.
Tired of boring, old "info" or "sales" or "customerservice" or "joesmith" @yourcompany.com? Come up with something creative and memorable that also delivers a marketing message:
Didn't get the domain name you were coveting? Make up for it with your business email address. Let's say you own a restaurant and want the domain name "greatfood.com". Well, you can try to battle 1-800-Flowers for it, but you'd do better to find a domain name that is available—hopefully one with more brand appeal than "greatfood.com"—and then create the email address email@example.com.
I know what you're thinking: your email address won't get as much exposure as your website address. Maybe not, but your business email address does get a LOT of exposure. And it should be displayed almost everywhere your website address and business phone number are displayed.