If you plan to send the newsletter to everyone on your list, have you thought about the "being labeld as Spam"-Problem?
Someone who hasn't visited the site for halve a year will probably not remember that he has subscribed to the newsletter when you send it to him.
Some of those people will click the "This is Spam"-Button.
Intelligent Spam Detection Systems on webbased email accounts will label the whole newsletter as Spam.
Your email provider could make problems because they think you spam people.