<s>
Roundcube	B-Language
is	O
a	O
web-based	O
IMAP	B-Protocol
email	O
client	O
.	O
</s>
<s>
Roundcube	B-Language
's	O
most	O
prominent	O
feature	O
is	O
the	O
pervasive	O
use	O
of	O
Ajax	B-General_Concept
technology	I-General_Concept
.	O
</s>
<s>
Roundcube	B-Language
is	O
free	B-License
and	I-License
open-source	I-License
software	I-License
subject	O
to	O
the	O
terms	O
of	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
(	O
GPL-3.0-or-later	B-License
)	O
,	O
with	O
exceptions	O
for	O
skins	O
and	O
plugins	B-Application
.	O
</s>
<s>
After	O
about	O
two	O
years	O
of	O
development	O
the	O
first	O
stable	O
release	O
of	O
Roundcube	B-Language
was	O
announced	O
in	O
early	O
2008	O
.	O
</s>
<s>
Roundcube	B-Language
is	O
written	O
in	O
PHP	B-Application
and	O
can	O
be	O
employed	O
in	O
conjunction	O
with	O
a	O
LAMP	B-Application
stack	I-Application
,	O
or	O
any	O
other	O
operating	O
systems	O
that	O
support	O
PHP	B-Application
are	O
supported	O
as	O
well	O
.	O
</s>
<s>
The	O
web	O
server	O
needs	O
access	O
to	O
the	O
IMAP	B-Protocol
server	I-Protocol
hosting	O
the	O
email	O
and	O
to	O
an	O
SMTP	B-Protocol
server	I-Protocol
to	O
be	O
able	O
to	O
send	O
messages	O
.	O
</s>
<s>
Roundcube	B-Language
Webmail	I-Language
is	O
designed	O
to	O
run	O
on	O
standard	O
web	O
servers	O
such	O
as	O
Apache	B-Application
,	O
LiteSpeed	B-Protocol
,	O
Nginx	B-Operating_System
,	O
Lighttpd	B-Protocol
,	O
Hiawatha	B-Application
or	O
Cherokee	B-Language
in	O
conjunction	O
with	O
a	O
relational	O
database	O
engine	O
.	O
</s>
<s>
Supported	O
databases	O
are	O
MySQL	B-Application
,	O
PostgreSQL	B-Application
and	O
SQLite	B-Language
.	O
</s>
<s>
The	O
user	O
interface	O
is	O
rendered	O
in	O
XHTML	B-Language
and	O
CSS	B-Language
and	O
is	O
fully	O
customizable	O
with	O
skins	O
.	O
</s>
<s>
Roundcube	B-Language
incorporates	O
jQuery	B-Language
as	O
part	O
of	O
its	O
distribution	O
,	O
as	O
well	O
as	O
other	O
libraries	O
such	O
as	O
GoogieSpell	O
and	O
TinyMCE	B-Application
.	O
</s>
<s>
Starting	O
with	O
version	O
0.3	O
,	O
Roundcube	B-Language
introduced	O
a	O
plug-in	B-Application
API	B-Application
which	O
allows	O
non-standard	O
features	O
to	O
be	O
added	O
without	O
the	O
need	O
to	O
modify	O
the	O
source	O
code	O
.	O
</s>
<s>
A	O
variety	O
of	O
plug-ins	B-Application
are	O
available	O
from	O
the	O
Plugin	B-Application
Repository	O
.	O
</s>
<s>
On	O
3	O
May	O
2015	O
,	O
Roundcube	B-Language
announced	O
,	O
in	O
partnership	O
with	O
Kolab	B-Protocol
Systems	I-Protocol
AG	I-Protocol
,	O
that	O
they	O
planned	O
to	O
completely	O
rewrite	O
Roundcube	B-Language
and	O
create	O
Roundcube	B-Language
Next	O
.	O
</s>
<s>
Roundcube	B-Language
Next	O
was	O
intended	O
to	O
include	O
additional	O
features	O
like	O
calendar	O
,	O
chat	O
and	O
file	O
management	O
.	O
</s>
<s>
This	O
was	O
to	O
be	O
implemented	O
using	O
WebRTC	B-Protocol
and	O
connectors	O
from	O
popular	O
services	O
like	O
Dropbox	B-Application
and	O
OwnCloud	B-Language
.	O
</s>
<s>
However	O
,	O
Kolab	O
Systems	O
and	O
Roundcube	B-Language
stopped	O
development	O
on	O
the	O
project	O
in	O
2016	O
,	O
with	O
no	O
information	O
or	O
refunds	O
provided	O
to	O
project	O
backers	O
,	O
leading	O
to	O
a	O
failed	O
crowdfund	O
.	O
</s>
<s>
A	O
Roundcube	B-Language
developer	O
later	O
claimed	O
Roundcube	B-Language
had	O
no	O
ownership	O
over	O
the	O
Roundcube	B-Language
Next	O
campaign	O
,	O
despite	O
its	O
public	O
engagement	O
and	O
ownership	O
on	O
the	O
crowdfund	O
page	O
.	O
</s>
<s>
Roundcube	B-Language
is	O
used	O
by	O
a	O
number	O
of	O
universities	O
to	O
provide	O
email	O
services	O
to	O
students	O
and	O
staff	O
such	O
as	O
Sanger	O
Institute	O
Tata	O
Institute	O
of	O
Social	O
Sciences	O
,	O
University	O
of	O
Florida	O
,	O
Harvard	O
University	O
,	O
University	O
of	O
Utah	O
,	O
University	O
of	O
Oregon	O
,	O
Stevens	O
Institute	O
of	O
Technology	O
,	O
Norwegian	O
University	O
of	O
Science	O
and	O
Technology	O
,	O
the	O
Technical	O
University	O
of	O
Dortmund	O
,	O
the	O
University	O
of	O
Cambridge	O
,	O
the	O
Indian	O
Institute	O
of	O
Technology	O
,	O
Delhi	O
,	O
Indian	O
Institute	O
of	O
Technology	O
,	O
Bombay	O
,	O
Institute	O
of	O
Physics	O
,	O
Bhubaneswar	O
,	O
Indian	O
Institute	O
of	O
Science	O
Education	O
and	O
Research	O
Kolkata	O
and	O
Department	O
of	O
Physics	O
,	O
Indian	O
Institute	O
of	O
Technology	O
,	O
Madras	O
,	O
University	O
of	O
Victoria	O
,	O
Bard	O
College	O
at	O
Simon	O
's	O
Rock	O
and	O
Bilkent	O
University	O
.	O
</s>
<s>
In	O
a	O
2009	O
interview	O
,	O
two	O
of	O
Roundcube	B-Language
's	O
core	O
developers	O
noted	O
that	O
the	O
largest	O
deployment	O
to	O
that	O
date	O
that	O
they	O
were	O
aware	O
of	O
was	O
at	O
the	O
University	O
of	O
Michigan	O
with	O
70,013	O
students	O
.	O
</s>
<s>
Roundcube	B-Language
is	O
also	O
used	O
in	O
the	O
Kolab	B-Protocol
Now	I-Protocol
service	O
which	O
supports	O
its	O
further	O
development	O
.	O
</s>
<s>
CPanel	B-Protocol
includes	O
Roundcube	B-Language
,	O
as	O
a	O
result	O
of	O
which	O
many	O
hosting	O
companies	O
around	O
the	O
world	O
such	O
as	O
HostGator	O
,	O
Media	B-General_Concept
Temple	I-General_Concept
,	O
Gandi	B-Protocol
,	O
OVH	B-General_Concept
and	O
others	O
use	O
RoundCube	B-Language
.	O
</s>
<s>
Roundcube	B-Language
Webmail	I-Language
IMAP	B-Protocol
client	O
was	O
also	O
incorporated	O
into	O
epesiBIM	B-Application
(	O
epesi	B-Application
Business	O
Information	O
Manager	O
)	O
,	O
a	O
web-based	O
,	O
open	O
source	O
CRM-like	O
application	O
.	O
</s>
<s>
Apple	O
's	O
Mac	B-Application
OS	I-Application
X	I-Application
10.7	I-Application
Lion	I-Application
Server	I-Application
operating	O
system	O
provided	O
Roundcube	B-Language
as	O
the	O
default	O
webmail	B-Protocol
client	O
in	O
Mail	O
Server	O
.	O
</s>
<s>
In	O
prior	O
versions	O
,	O
SquirrelMail	B-Language
had	O
been	O
the	O
default	O
client	O
.	O
</s>
<s>
In	O
2013	O
,	O
Iran	O
's	O
Ministry	O
of	O
ICT	O
launched	O
the	O
national	O
email	O
service	O
at	O
mail.post.ir	O
which	O
used	O
Roundcube	B-Language
.	O
</s>
<s>
Synology	O
Inc.	O
'	O
s	O
DiskStation	O
Manager	O
(	O
DSM	O
)	O
uses	O
Roundcube	B-Language
for	O
their	O
Mail	O
Station	O
package	O
.	O
</s>
