<s>
Oracle	B-Application
Communications	I-Application
Messaging	I-Application
Server	I-Application
is	O
Oracle	B-Application
's	O
messaging	O
(	O
email	O
)	O
server	O
software	O
.	O
</s>
<s>
The	O
software	O
was	O
obtained	O
by	O
Oracle	B-Application
as	O
part	O
of	O
the	O
company	O
's	O
acquisition	O
of	O
Sun	O
in	O
2010	O
.	O
</s>
<s>
Oracle	B-Application
's	O
Messaging	O
Server	O
could	O
potentially	O
be	O
the	O
most	O
widely	O
deployed	O
commercial	O
email	O
server	O
on	O
the	O
planet	O
,	O
with	O
claims	O
of	O
150	O
million	O
mailboxes	O
deployed	O
worldwide	O
(	O
mostly	O
by	O
ISPs	O
,	O
telcos	O
,	O
universities	O
,	O
government	O
,	O
and	O
cable	O
TV	O
broadband	B-General_Concept
providers	O
)	O
.	O
</s>
<s>
The	O
Messaging	O
Server	O
was	O
part	O
of	O
Sun	O
's	O
Java	B-Application
Enterprise	I-Application
System	I-Application
bundle	O
of	O
Internet/Intranet	O
server	O
software	O
from	O
2003	O
to	O
2006	O
.	O
</s>
<s>
In	O
2006	O
,	O
the	O
Messaging	O
Server	O
was	O
packaged	O
as	O
part	O
of	O
smaller	O
bundle	O
called	O
the	O
Sun	B-Protocol
Java	I-Protocol
System	I-Protocol
Communications	I-Protocol
Suite	I-Protocol
which	O
includes	O
Sun	B-Application
Java	I-Application
System	I-Application
Calendar	I-Application
Server	I-Application
,	O
Sun	B-Application
Java	I-Application
System	I-Application
Instant	B-Application
Messaging	I-Application
Server	O
,	O
and	O
Sun	B-Language
Java	I-Language
System	I-Language
Communications	I-Language
Express	I-Language
.	O
</s>
<s>
This	O
suite	O
is	O
now	O
known	O
as	O
Oracle	B-Application
Communications	O
Unified	O
Communications	O
Suite	O
.	O
</s>
<s>
Supporting	O
server	O
software	O
for	O
the	O
Messaging	O
Server	O
includes	O
Sun	B-Application
Java	I-Application
System	I-Application
Directory	I-Application
Server	I-Application
,	O
Sun	B-Language
Java	I-Language
System	I-Language
Access	I-Language
Manager	I-Language
,	O
and	O
Oracle	B-Language
iPlanet	I-Language
Web	I-Language
Server	I-Language
.	O
</s>
<s>
Messaging	O
Server	O
also	O
includes	O
a	O
web	B-Application
application	I-Application
called	O
Convergence	O
,	O
which	O
provides	O
webmail	B-Protocol
as	O
well	O
as	O
web-based	B-Application
access	O
to	O
other	O
Communications	O
Suite	O
functionality	O
such	O
as	O
calendaring	B-Application
and	O
instant	B-Application
messaging	I-Application
.	O
</s>
<s>
The	O
Messaging	O
Server	O
is	O
supported	O
to	O
run	O
on	O
multiple	O
operating	B-General_Concept
systems	I-General_Concept
including	O
Solaris	B-Application
and	O
Red	O
Hat	O
Enterprise	O
Linux	O
.	O
</s>
<s>
Versions	O
5.2	O
,	O
6.1	O
and	O
6.2	O
were	O
also	O
available	O
for	O
HP-UX	B-Application
and	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
