<s>
Mulberry	B-Application
is	O
an	O
open-source	B-Application
email	B-Protocol
client	I-Protocol
marketed	O
by	O
Cyrusoft	O
from	O
approximately	O
1995	O
to	O
2005	O
.	O
</s>
<s>
Originally	O
developed	O
for	O
the	O
Apple	B-Device
Macintosh	I-Device
,	O
versions	O
now	O
exist	O
for	O
that	O
platform	O
as	O
well	O
as	O
Microsoft	B-Application
Windows	I-Application
and	O
Linux	B-Application
using	O
the	O
X	B-Operating_System
window	I-Operating_System
system	I-Operating_System
.	O
</s>
<s>
Mulberry	B-Application
's	O
strengths	O
include	O
strict	O
compliance	O
with	O
Internet	O
standards	O
such	O
as	O
IMAP	B-Protocol
,	O
LDAP	B-Protocol
,	O
IMSP	B-Protocol
,	O
ACAP	B-Protocol
,	O
and	O
iCalendar	O
,	O
a	O
unique	O
GUI	B-Application
for	O
defining	O
Sieve	O
(	O
mail	O
filtering	O
language	O
)	O
scripts	O
and	O
support	O
for	O
IMAP	B-Protocol
disconnected	O
operation	O
.	O
</s>
<s>
As	O
of	O
August	O
20	O
,	O
2006	O
,	O
with	O
version	O
4.0.5	O
,	O
Mulberry	B-Application
was	O
made	O
available	O
at	O
no	O
cost	O
,	O
but	O
remained	O
proprietary	O
.	O
</s>
<s>
The	O
most	O
recent	O
version	O
,	O
4.0.8	O
,	O
was	O
released	O
for	O
Macintosh	B-Device
(	O
as	O
a	O
Universal	B-Operating_System
Binary	I-Operating_System
)	O
,	O
Windows	O
,	O
and	O
Linux	B-Application
on	O
February	O
23	O
,	O
2007	O
.	O
</s>
<s>
However	O
,	O
Cyrus	O
Daboo	O
made	O
Mulberry	B-Application
available	O
as	O
open	B-Application
source	I-Application
on	O
all	O
three	O
platforms	O
on	O
November	O
21	O
,	O
2007	O
,	O
under	O
the	O
terms	O
of	O
the	O
Apache	B-Application
License	I-Application
2.0	O
.	O
</s>
