Shares of Internet-based mailing and shipping solutions company Stamps.com (NASDAQ: STMP) fell as much as 10.4% on Monday after Pitney Bowes (NYSE: PBI) announced a new competing offering for its cloud-based SendPro mailing and shipping solution. Shares of Stamps.com closed the trading day down 7.9%.Pitney Bowes asserted in a press release Monday morning that its new $5 SendPro delivers three times the benefits of Stamps.com's solutions for one-third of the cost.Image source: Getty Images.Continue reading