Email subscriber lists are constantly changing. Whether they grow, change, or become a mess over time, they require proper list management. We’ve worked with many lists of all types. Internal, promotional, management and more. A list typically changes over time, by adding fields, removing fields, merging data, importing and exporting. Many of these changes often create what we call “dirty data” lists. With the proper list management efforts, most changes can be done without creating a mess.