While the dates are correct, Amiga development didn't stop in 1994, Yam, Simplemail etc. have all come out in the late 90s/00s.
Also, MS was using MAPI for their clients to talk to their servers before they had Exchange. (MS PC Mail, MS Mail - 1991-ish).
That being said, MS always kept the MAPI protocols pretty close to their company...
desiv
