<s>
hMailServer	B-Language
is	O
a	O
free	O
email	B-Protocol
server	I-Protocol
for	O
Windows	O
created	O
by	O
Martin	O
Knafve	O
.	O
</s>
<s>
It	O
has	O
support	O
for	O
IMAP	B-Protocol
,	O
POP3	B-Protocol
,	O
and	O
SMTP	B-Protocol
email	O
protocols	O
.	O
</s>
<s>
It	O
can	O
use	O
external	O
database	O
engines	O
such	O
as	O
MySQL	B-Application
,	O
MS	B-Application
SQL	I-Application
or	O
PostgreSQL	B-Application
,	O
or	O
an	O
internal	O
MS	B-Application
SQL	I-Application
Compact	O
Edition	O
engine	O
to	O
store	O
configuration	O
and	O
index	O
data	O
.	O
</s>
<s>
The	O
actual	O
email	O
messages	O
are	O
stored	O
on	O
disk	O
in	O
a	O
raw	O
MIME	B-Protocol
format	O
.	O
</s>
<s>
Users	O
can	O
be	O
authenticated	O
both	O
against	O
the	O
local	O
hMailServer	B-Language
user	O
system	O
and	O
against	O
an	O
external	O
Active	O
Directory	O
.	O
</s>
<s>
hMailServer	B-Language
offers	O
a	O
number	O
of	O
different	O
AntiSpam	O
mechanisms	O
:	O
</s>
<s>
hMailServer	B-Language
has	O
built	O
in	O
support	O
for	O
ClamWin/ClamAV	O
.	O
</s>
<s>
The	O
hMailServer	B-Language
project	O
was	O
started	O
in	O
2003	O
.	O
</s>
<s>
Since	O
version	O
5.4	O
,	O
hMailServer	B-Language
is	O
licensed	O
under	O
the	O
GNU	B-Application
AGPL	I-Application
3	O
.	O
</s>
<s>
The	O
current	O
version	O
of	O
hMailServer	B-Language
appears	O
to	O
be	O
open	O
source	O
again	O
.	O
</s>
<s>
This	O
is	O
also	O
noted	O
on	O
the	O
hMailServer	B-Language
home	O
page	O
.	O
</s>
