On Wed, Oct , at 03:20:53PM -0500, Jonathan Hutchins wrote: > ---- Original Message ----- > From: "Brian Densmore" > > > POP3, IMAP, and (I believe) Microsoft uses another proprietary protocol. > > Microsoft uses "MAPI". > MAPI is not a mail protocal it is Mail Application Programming Interface, and you find a variant of it in your linux desktop environments as well. It is what allows you to send mail from apps that have no mail functionality of thier own. Usually by opening the message window of your mail client. GNome uses a default MAPI client of Evolution. It is simply a client side API for allowing apps to communicate. GNome and KDE are using variations on CORBA to achieve this if I'm not mistaken.