Email Marketing: Single Optin vs Double Optin

Email Marketing: Single Optin vs Double Optin Email Marketers are constantly debating the worth of single optin vs double optin when it comes to building their lists. Single optin simply means that someone can enter any information in to a captur...
http://blog.trafficwave.net/2015/10/email-marketing-single-optin-vs-double-optin-2/