Vendor Independent Messaging

Source: Wikipedia, the free encyclopedia.

VIM (Vendor Independent Messaging) was a standard

MAPI, which was the eventual winner of the MAPI v. VIM war. Ultimately, the choice of VIM or MAPI did not make a huge difference: bridges meant that an MAPI client could access a VIM provider and vice versa, and the rise of Internet e-mail in the mid-1990s rendered the panoply of proprietary
e-mail systems which VIM and MAPI were meant to cater to largely irrelevant.