nt size="2 E-mail and cell phones are two of the greatest inventions of the past quarter century. It makes sense that people want to marry the two and be able to send and receive e-mail on their cell phones. According to a 2006 M:Metrics Inc. survey of mobile phone users, 50.8 percent of smart phone owners use their phone for e-mail. That translates to about 17 million people. E-mail-enabled phones have become an important tool for busy people to stay in touch when away from their desktop PCs.