Listia is a social online marketplace and mobile application where users can sell and bid on items using credits instead of real money. Listia has been featured in various media including ABC News, New York Daily News, TechCrunch, Family Circle Magazine, PC Magazine and the Los Angeles Times. Often dubbed as the social network for trading goods, Listia has grown into a wide community with more than 8 million users. Listia relies on email to communicate with their users and for traders to communicate with each other. Because of the real-time nature of their business model, email is imperative to executing their value proposition and retaining customers. For example, emails are sent when members outbid one another, when friends join the network, for reminders and more.