Complex sentence: Several email software products clients were developed to facilitate email handling from a PC These includes Lotus Express, Norton Commander's MCI Mail utility, MailRoom from Sierra Solutions, Emma, and MCI's own MCI Mail Express and Express Lite.
Split into simpler sentences: Several email software products were developed to facilitate email handling from a PC. These included Lotus Express, Norton Commander's MCI Mail utility, MailRoom from Sierra Solutions, Emma, and MCI's own MCI Mail Express and Express Lite.