<s>
MailScanner	B-Protocol
is	O
an	O
open	B-Application
source	I-Application
email	O
security	O
system	O
for	O
use	O
on	O
Unix	B-Application
email	O
gateways	O
and	O
was	O
first	O
released	O
in	O
2001	O
.	O
</s>
<s>
It	O
is	O
distributed	O
under	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
.	O
</s>
<s>
The	O
original	O
author	O
,	O
Julian	O
Field	O
,	O
won	O
the	O
2004	O
Open	B-Application
Source	I-Application
Award	O
from	O
UKUUG	O
for	O
the	O
product	O
.	O
</s>
<s>
MailScanner	B-Protocol
is	O
implemented	O
in	O
around	O
50,000	O
lines	O
of	O
Perl	B-Language
.	O
</s>
<s>
Email	B-Protocol
server	I-Protocol
(	O
MTA	B-Protocol
)	O
(	O
e.g.	O
</s>
<s>
sendmail	B-Application
,	O
postfix	B-Application
)	O
.	O
</s>
<s>
Anti-virus	B-Application
software	I-Application
(	O
e.g.	O
</s>
<s>
ClamAV	B-Application
–	O
over	O
twenty	O
five	O
different	O
products	O
are	O
supported	O
)	O
.	O
</s>
<s>
Anti-spam	O
software	O
(	O
SpamAssassin	B-Language
)	O
.	O
</s>
<s>
In	O
2009	O
evidence	O
suggested	O
that	O
a	O
quad	O
Xeon	B-Device
PC	B-Device
with	O
2	O
GB	O
of	O
RAM	O
and	O
15	O
kRPM	O
SCSI	B-Architecture
disks	O
can	O
process	O
something	O
in	O
the	O
area	O
of	O
2.2	O
million	O
messages	O
per	O
day	O
.	O
</s>
<s>
previously	O
used	O
MailScanner	B-Protocol
before	O
implementing	O
its	O
own	O
next	O
generation	O
engine	O
.	O
</s>
