There are many pieces of the puzzle when managing an email subscriber list. Keeping the list squeaky clean is the best piece of advice any developer will give you, but we won’t drill down the specifics now. We often help clients maintain their lists, and we’ve even gone through pruning and cleaning a time or two. We’ve hit many walls and answered many questions, but one of the most frequent questions we’ve received is, “What is a Spam Trap email address?”