As someone who runs websites and email marketing campaigns, Email List Validation has saved me from sending campaigns to poor-quality lists. It's reliable, quick, and has helped me improve deliverability and protect sender reputation which is critical for small businesses working hard to build trust with their audiences. It's one of those "must-do" steps that too many people skip, but this app makes it simple. I run my lists and my clients list through this and its very easy to use - totally recommend it!