<s>
Sympa	B-Language
is	O
a	O
Mailing	O
list	O
management	O
(	O
MLM	O
)	O
software	O
.	O
</s>
<s>
Sympa	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	B-License
)	O
.	O
</s>
<s>
Sympa	B-Language
's	O
features	O
include	O
bulk	O
mailing	O
,	O
service	O
messages	O
and	O
web	O
pages	O
defined	O
by	O
templates	O
,	O
subscriber	O
information	O
stored	O
in	O
a	O
RDBMS	O
,	O
and	O
an	O
external	O
antivirus	O
plugin	O
.	O
</s>
<s>
one	O
site	O
per	O
user	O
,	O
while	O
Mailman	B-Application
(	O
prior	O
to	O
3.0	O
)	O
,	O
for	O
example	O
,	O
creates	O
one	O
site	O
per	O
list	O
)	O
.	O
</s>
<s>
Data	O
is	O
stored	O
in	O
a	O
relational	O
database	O
such	O
as	O
MySQL	B-Application
,	O
PostgreSQL	B-Application
,	O
or	O
Oracle	B-General_Concept
;	O
some	O
configuration	O
data	O
is	O
still	O
held	O
in	O
text	O
files	O
,	O
but	O
the	O
stated	O
goal	O
of	O
the	O
developers	O
is	O
to	O
eventually	O
hold	O
as	O
much	O
configuration	O
data	O
as	O
possible	O
in	O
the	O
database	O
as	O
well	O
.	O
</s>
<s>
Sympa	B-Language
consists	O
of	O
at	O
least	O
five	O
concurrent	O
daemons	B-Operating_System
communicating	O
through	O
the	O
database	O
or	O
by	O
placing	O
files	O
in	O
spools	O
:	O
a	O
main	O
daemon	B-Operating_System
accepting	O
incoming	O
mail	O
and	O
controlling	O
the	O
other	O
processes	O
,	O
a	O
bounce	O
daemon	B-Operating_System
managing	O
incoming	O
bounces	O
,	O
an	O
archiver	O
archiving	O
outgoing	O
mail	O
,	O
a	O
task	O
manager	O
doing	O
scheduled	O
maintenance	O
and	O
a	O
bulk	O
mailer	O
doing	O
the	O
actual	O
distributing	O
of	O
list	O
messages	O
to	O
their	O
recipients	O
.	O
</s>
<s>
The	O
work	O
of	O
the	O
main	O
daemon	B-Operating_System
can	O
be	O
split	O
up	O
into	O
up	O
to	O
three	O
parallel	O
instances	O
;	O
of	O
the	O
bulk	O
mailer	O
,	O
an	O
arbitrary	O
number	O
of	O
instances	O
may	O
be	O
run	O
in	O
parallel	O
.	O
</s>
<s>
This	O
architecture	O
,	O
combined	O
with	O
the	O
use	O
of	O
a	O
database	O
table	O
for	O
buffering	O
outgoing	O
mail	O
,	O
makes	O
Sympa	B-Language
well-suited	O
for	O
large	O
and	O
very	O
large	O
list	O
environments	O
handling	O
millions	O
of	O
subscribers	O
.	O
</s>
<s>
Other	O
features	O
are	O
:	O
(	O
a	O
full	O
list	O
of	O
features	O
is	O
available	O
on	O
the	O
Sympa	B-Language
web	O
site	O
.	O
)	O
</s>
<s>
Sympa	B-Language
development	O
started	O
in	O
1995	O
and	O
was	O
first	O
released	O
in	O
1997	O
.	O
</s>
<s>
Its	O
initial	O
goal	O
was	O
to	O
ensure	O
continuity	O
with	O
the	O
TULP	O
list	O
manager	O
,	O
produced	O
partly	O
by	O
the	O
initial	O
author	O
of	O
Sympa	B-Language
,	O
Christophe	O
Wolfhugel	O
.	O
</s>
<s>
The	O
initial	O
version	O
of	O
Sympa	B-Language
included	O
authentication	O
,	O
flexible	O
command	O
management	O
,	O
high	O
performance	O
in	O
internal	O
data	O
access	O
,	O
and	O
object-oriented	O
code	O
for	O
easy	O
code	O
maintenance	O
.	O
</s>
<s>
Since	O
2011	O
,	O
Sympa	B-Language
development	O
has	O
been	O
handled	O
by	O
RENATER	O
.	O
</s>
<s>
Since	O
2017	O
,	O
Sympa	B-Language
development	O
has	O
been	O
handled	O
by	O
The	O
Sympa	B-Language
Community	O
.	O
</s>
<s>
Among	O
the	O
customers	O
adopting	O
Sympa	B-Language
are	O
the	O
Scottish	O
universities	O
of	O
Edinburgh	O
and	O
Glasgow	O
.	O
</s>
