"Many years ago when I worked at Novell, management would
regularly send email instructing every employee to carefully find
and forward all email regarding a particular subject. The
instructions, typically made at the behest of the legal department
also asked that employees not delete anything related to that
subject. However, after receiving about four such requests--and
since litigation among technology companies was the exception and
not the norm at that time--I started to ignore the email.
Nonetheless, Novell's concerns were well-founded, because email
frequently lies at the intersection of IT and litigation..."