That might not be best suited for your product or service. Some people will get Email addresses from yellowpages.com, superpages.com or just mailing list writing to webmasters from their contact us pages. This is especially easy to do if you are soliciting companies that have a website. It can be a little trickier, if you are targeting individual consumers, however.
Of course, if your product or service will be used for local or regional customer Email marketing, then the white pages can be helpful for direct contact, such as direct mailing or phoning, but not efficient for Email marketing unless you can get them to provide their Email address with a free e-newsletter offer, for example.
The trick to a successful Email marketing campaign is to make it VERY personal and offer something they cannot refuse in your very first email. Even mailing list then, expect a 5-10% response rate, but if you make offers they can't refuse periodically through a regular Email marketing campaign, you will eventually build up customer loyalty and trust.