When you decide to have an opt-in list, it is not just a matter of sending your subscribers your promotional newsletters or catalogs. There are many things to consider in avoiding many complicated situations. While there are so many ways you can entice people subscribe to your list, there are also some things you must do to avoid subscribers from wanting to be removed from your list.
Aside from that, you also want to avoid any problems with the law and your internet service provider or ISP. There are now many laws and rules that are applied to help protect the privacy of the internet users from spamming and unwanted mail. With the popularity of the email as a medium for marketing because of the low cost, many company's have seized the opportunity and have flooded many people's e-mail accounts with promotional mail.
But, with an opt-in list, you avoid this annoyance because people subscribe to the list; they want to receive the newsletters and promotional materials. They have consented to being on the list by subscribing themselves, just don't forget to put an unsubscribe feature everytime in your opt-in list so that you avoid any confusion. There may be times when an email account was provided when the real owner didn't want to subscribe.