Re: "Internet e-mail is not a secure medium..."
Well, I wouldn't classify UUCP as more secure than SMTP. UUCP was, more-or-less, an electronic implementation of PG Wodehouse's method for physical letters: throw them out the window, and trust that an honest person will pick them up and pop them in a letter box. At least with SMTP you have a TCP connection between your mail server and the recipient's mail server, so the bar is raised to ankle height: only admins at the sending or receiving organisations, plus anyone who can get a packet sniffer on the route in between.
Biting the hand that feeds IT
