<s>
IMSP	B-Protocol
is	O
Internet	O
Message	O
Support	O
Protocol	O
.	O
</s>
<s>
Work	O
on	O
standardizing	O
IMSP	B-Protocol
was	O
never	O
completed	O
because	O
it	O
was	O
superseded	O
by	O
the	O
ACAP	B-Protocol
protocol	O
,	O
which	O
provides	O
a	O
superset	O
of	O
IMSP	B-Protocol
's	O
functionality	O
.	O
</s>
<s>
An	O
IMSP	B-Protocol
server	O
is	O
available	O
for	O
from	O
CMU	O
.	O
</s>
<s>
The	O
Horde	B-Language
PHP	O
framework	O
and	O
applications	O
have	O
IMSP	B-Protocol
support	O
.	O
</s>
<s>
Mulberry	B-Application
supports	O
IMSP	B-Protocol
storage	O
of	O
mail	O
preferences	O
and	O
address	O
books	O
.	O
</s>
<s>
Silkymail	B-Application
(	O
discontinued	O
)	O
supported	O
IMSP	B-Protocol
storage	O
of	O
mail	O
preferences	O
and	O
address	O
books	O
.	O
</s>
<s>
Address	O
books	O
were	O
shared	O
with	O
Mulberry	B-Application
.	O
</s>
<s>
Simeon	B-Protocol
(	O
discontinued	O
)	O
supported	O
IMSP	B-Protocol
storage	O
of	O
mail	O
preferences	O
and	O
address	O
books	O
.	O
</s>
<s>
An	O
IMSP	B-Protocol
address	O
book	O
plugin	O
is	O
available	O
for	O
SquirrelMail	B-Language
.	O
</s>
