Single Optin Vs Double Optin - Which setting to choose? One of the biggest confusion which setting up your list is in choosing between a single optin and a double optin and why. Double optin has its own advantages, the biggest one being "checking your spam complaints". Because when you know that people have clicked on a confirmation link, they really want to be on your list and that way your spam complaints will be lower. But is double optin the best option? Read on to find out.. Visit http://dkspeaks.com for more indepth articles and tips.