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A Brief History
Mulberry started off life as a software project that was really meant to help the author learn more about the internet and internet protocols used for email. However, it became much more than that and garnered support from a small (in internet terms) group of users and institutions many of whom relied on the product as their primary email tool.

Whilst it started as only an IMAP client and only on Mac OS, it has grown to cover not only other email protocols, but also calendaring and scheduling and is available on Mac OS X, Windows and Linux systems.

Adherence to standards is a key belief on the part of the developers, and active participation in the Internet Engineering Task Force and the standards process is an important aspect.

Ultimately the failure of the original company (for a whole host of reasons) was really a reflection of the fact that Mulberry had failed to grow a market share that could sustain the company in a market where free clients (of varying quality) are readily available.

Now Mulberry itself is free, though its future is still cloudy in terms of whether development will advance or not...

Time Line
1995/1996 Mulberry was originally developed by Cyrus Daboo whilst working in the Physics Deptartment at the University of Cambridge, UK. Originally developed for Mac OS.
June 1996 Cyrus leaves the University to setup on his own to continue to develop Mulberry into a product. A close relationship was maintained with the Computing Service Department at the University, who had an interest in having Mulberry for their own users. This lead to the development of the administrator configuration feature that was to prove vital for deployment at large sites.
September 20th 1996 Mulberry v1.0 for Mac OS is released!
November 1996 Cyrus attends the 2nd International IMAP Symposium in Seattle, WA, USA and meets with Matthew Wall, then working as project manager on Carnegie Mellon University's aptly named Project Cyrus email system. One of Matthew's roles was to evaluate email clients for use by the university with their system, and he was immediately attracted to the possibilities of Mulberry.
December 1996 Cyrus starts work on the Windows version of Mulberry - aided by Metrowerks x86 cross-compiler and remote debugging development tools which allowed development to be done on a Mac. This made the porting and subsequent development and support of the cross-platform product much easier.
January 1997 Cyrus visits Matthew in Pittsburgh and final details of a new company were worked on.
February 14th 1997 Cyrusoft International, Inc. of Pittsburgh, PA, USA was formally incorporated.
May 1997 Mulberry v1.2 for Mac OS and Windows released. After five months work the Windows port is complete!
October 1997 Cyrus moves to Pittsburgh permanently.
November 14th 1997 Mulberry v1.3 with IMSP, LDAP, identities support released.
October 8th 1998 Mulberry v1.4 with multiple accounts, full SASL authentication released.
March 30th 2000 Mulberry v2.0 with POP, local and disconnected mailboxes, PGP released.
January 2001 New CEO hired.
February 6th 2001 Mulberry v2.0.6 released - now with support for Linux and Solaris.
August 28th 2001 Mulberry v2.1 with filters and SIEVE support, threaded view released.
April 22nd 2002 Mulberry v2.2 released.
September 2002 Matthew Wall leaves the company as a full time employee.
November 12th 2002 Mulberry v3.0 with 3-pane option, toolbars and tabbed mailboxes released.
November 5th 2003 Mulberry v3.1 with S/MIME released.
May 20th 2004 Cyrusoft merges with ISELab to form ISAMET, Inc. and incorporates new secure agent technology in a move to try and break into the emergency messaging product market.
May 20th 2005 Mulberry v4.0 with redesigned UI, unicode and calendar support released.
May 2005 CEO leaves the company following the company's failure to close a major contract in the emergency messaging space.
September 30th 2005 Cyrusoft International, Inc. dba ISAMET, Inc. files for bankruptcy under US code Chapter 7. All company operations cease.
August 2006 Cyrus Daboo purchases key Mulberry assets from creditors and sets up new site for distribution of a free version of Mulberry.
Mulberry v4.0.5 released - now its Free!
November 2007 Official release of Mac OS X, Windows and Linux open source code.