We are often asked by volume email senders just why we urge people to use confirmed opt-in (or "double opt-in") whenever possible. After all, they know that they are being ethical and only adding to their mailing lists people whom they believe really want their mailings. Why should they have to go through the added "hassle" of using confirmed opt-in? Here's why.
It's always nice when an independent third-party study substantiates what we've been saying all along. In this case, a study by Harris Interactive on behalf of Merkle (the database marketing people) has found that between 73 to 75% of people hit "unsubscribe" because either they feel that they are getting email from you too often, or that it is not relevant, or both.
I recently had the pleasure of working with journalist Karen Bannen, on an article that she was doing for BtoB Online. Karen interviewed both myself and R. Dave Lewis for the piece, in which she distilled down to their essence 5 ways to improve your email deliverability.