While email apps like Incredimail offer an excellent resource for organizing your inbox, these new tools are challenged with an old email problem: inbox overload. These apps offer the ability to organize task lists around your email messages, so for example, you can assign a marketing message to a task list for further review. The problem is that with so many emails coming in, this further review category can get bogged down. And unlike Web-based email clients, most of these apps don't have multi-delete features, so you'll have to individually delete every single unnecessary message.