1. Manage Your Feedback Loops. Any time someoneclicks the "spam" button in your email client,they should be removed from your listimmediately.
2. Be clear with your opt-in process/subscriberexpectations. What are they opting in "FOR" andhow often are they expecting to get emails fromyou?
3. Use your "From Address","SubjectLine", and "Preview Pane" as brandingelements: http://www.emaildelivered.com/whitelist-generator/
4. Make the opt OUT process EASY! Dont hide your unsubscribetext in 2pt font at the bottom of your message, requiresubscribers to re-enter their email address after they click thelink, etc. KEEP IT SIMPLE! (Otherwise, theyre going to hit the"spam" button becauseits just easier).
5. Monitor the "reply-to" email address. In other words, dont usea firstname.lastname@example.org! You want people to be able torequest to unsubscribe by sending an reply email.
6. Test Frequency of Emails. If you send too many emails, you mayoverdo it. If you dont send enough, they wont rememberwho youare. (Remember,everyone is inundated with information thesedays and out of sight = out of mind!)
7. Offer a "Manage Subscriptions" pagewhere people candowngrade their subscriptions. (For example, instead of yourdaily email, they can choose to get only your once/week digest).