Seemingly, some 50 percent of corporate e-mail communications are non-business related, and are either spam or personal mail, according to a new research study. Published today by Radicati Group, the study claims that 23 percent of all messages in respondents' corporate mailboxes were personal and non-work related in nature. The study also found that 33 percent of corporate email is spam. This led to the conclusion that some half of corporate mail is not corporate related.

"It is no secret that employees use their corporate email for personal matters, but the specific level was unknown," said Marcel Nienhuis, market analyst at the Radicati Group.

"These results indicate that personal use of corporate email may be higher than employers expect, representing a potentially significant loss in productivity."