If you send out email blasts, we strongly recommend utilizing a third party service. There are many email marketing services on the internet.
- MailChimp
- Constant Contact
- Topica
- Vertical Response
- Emma Mail
They provide statistics on the campaigns you send out. A reputable email marketing company will have special relationships with IPs and know how to send proper headers so that your emails get delivered to your customers. They also provide the proper automated means for customers to subscribe and unsubscribe, many with website APIs for seamless integration.