The systems man in our place says: '[This type of Email] may or may not be a virus. I cannot possibly know, nor the people on VIRUS-L. However there are quite a few documented cases of damage being caused by rogue email. Most unix systems have DEC compatible keyboards connected, and one famous mail message consisted of unprintable control codes that redefined the keyboard, so that a particular key would send a string of characters to the host ( usually cd / <return> and rm -r * ) if you were root or a privileged user then damage would occur.
Microsoft mail and Lotus CCmail are two of the most common mail programs installed on PCs, both these mail programs allow for custom messages, ie Schedule Plus, message acceptance, It is possible to write ( using simple Visual basic ) specific message types that could do damage.' Dan.

