Heh, I remember attending trade shows in a time when X.400 and X.500 were all the rage. Always a bad sign when another protocol comes along and calls itself "l

Heh, I remember attending trade shows in a time when X.400 and X.500 were all the rage. Always a bad sign when another protocol comes along and calls itself "lightweight", as in LDAP, the "lightweight directory access protocol" merely based on X.500. SMTP is also the "simple" mail transfer protocol, but it's not based on X.400 in any way and was apparently replacing... FTP! (Only for one particular use case obviously.)