The CAN-SPAM Act governs email marking.

E-mail Newsletters can help build your brand and customer loyalty. Relevant, timely, useful information in your newsletter serves the interests and needs of your audience. Special offers and promotions are a great way to drive traffic back to your site for more information. 

With quality email marketing services, you also have access to data about how many people read those emails and followed links in the emails back to your web site.

But, sometimes people will want to stop receiving your emails!  Perhaps they've moved away, or just don't see your newsletters as relevant to them (now, that's another topic to discuss soon!).  The CAN-SPAM Act includes the requirement to allow folks to "unsubscribe" from your email list.  Learn more about the CAN-SPAM Act from this FTC publication: http://www.ftc.gov/bcp/edu/pubs/business/ecommerce/bus61.shtm

I use and recommend Ratepoint for Email Marketing.  They make it easy to comply with the CAN-SPAM Act.  They also provide Online Surveys and Customer Feedback.  If you are considering adding any of these services to your current advertising and marketing strategies, give me a call and I'll explain why I choose Ratepoint over Constant Contact, Mail Chimp, and iContact.  If you want, I can also help you create your newsletters and surveys, or provide coaching to your employees who are responsible for these areas.