<s>
yProxy	B-Application
is	O
a	O
Network	B-Protocol
News	I-Protocol
Transfer	I-Protocol
Protocol	I-Protocol
(	O
NNTP	B-Protocol
)	O
proxy	B-Application
server	I-Application
for	O
the	O
Windows	B-Application
operating	I-Application
system	I-Application
.	O
</s>
<s>
yProxy	B-Application
's	O
main	O
function	O
is	O
to	O
convert	O
yEnc-encoded	O
attachments	O
to	O
UUE-encoded	O
attachments	O
on	O
the	O
fly	O
.	O
</s>
<s>
The	O
main	O
purpose	O
of	O
this	O
is	O
to	O
add	O
functionality	O
to	O
NNTP	B-Protocol
newsreaders	O
that	O
do	O
not	O
have	O
native	O
support	O
for	O
yEnc	O
.	O
</s>
<s>
The	O
inventor	O
of	O
yEnc	O
recommends	O
yProxy	B-Application
for	O
use	O
by	O
Windows	B-Application
users	O
whose	O
newsreaders	O
do	O
not	O
support	O
yEnc	O
decoding	O
.	O
</s>
<s>
yProxy	B-Application
comes	O
in	O
two	O
varieties	O
:	O
</s>
<s>
The	O
latest	O
free	O
version	O
of	O
yProxy	B-Application
is	O
version	O
1.3	O
.	O
</s>
<s>
In	O
the	O
spring	O
of	O
2002	O
,	O
shortly	O
after	O
yEnc	O
gained	O
popularity	O
in	O
binary	O
newsgroups	O
,	O
yProxy	B-Application
was	O
released	O
as	O
freeware	O
.	O
</s>
<s>
yProxy	B-Application
was	O
designed	O
to	O
convert	O
yEnc	O
attachments	O
as	O
they	O
are	O
downloaded	O
,	O
without	O
user	O
intervention	O
.	O
</s>
<s>
Because	O
yProxy	B-Application
is	O
a	O
proxy	B-Application
server	I-Application
,	O
once	O
it	O
is	O
configured	O
,	O
the	O
user	O
must	O
only	O
ensure	O
that	O
yProxy	B-Application
is	O
running	O
in	O
order	O
to	O
use	O
it	O
.	O
</s>
<s>
Due	O
to	O
the	O
design	O
of	O
yProxy	B-Application
as	O
a	O
generic	O
NNTP	B-Protocol
proxy	B-Application
server	I-Application
,	O
yProxy	B-Application
can	O
be	O
used	O
by	O
any	O
NNTP	B-Protocol
newsreader	O
.	O
</s>
<s>
There	O
are	O
many	O
free	O
and	O
commercial	O
NNTP	B-Protocol
newsreader	O
clients	O
that	O
do	O
not	O
natively	O
support	O
yEnc	O
.	O
</s>
<s>
yProxy	B-Application
was	O
designed	O
to	O
let	O
the	O
user	O
continue	O
to	O
use	O
his	O
or	O
her	O
existing	O
newsreader	O
.	O
</s>
<s>
The	O
free	O
version	O
of	O
yProxy	B-Application
is	O
not	O
supported	O
on	O
Windows	B-Application
Vista	I-Application
or	O
Windows	B-Device
7	I-Device
due	O
to	O
yProxy	B-Application
's	O
dependency	O
on	O
WinHelp	O
for	O
the	O
help	O
file	O
.	O
</s>
<s>
In	O
addition	O
,	O
the	O
free	O
version	O
of	O
yProxy	B-Application
only	O
includes	O
instructions	O
for	O
configuring	O
Outlook	B-Application
Express	I-Application
,	O
which	O
does	O
not	O
apply	O
to	O
Windows	B-Application
Vista	I-Application
's	O
free	O
email	O
and	O
NNTP	B-Protocol
client	O
,	O
Windows	B-Protocol
Mail	I-Protocol
or	O
Windows	B-Application
Live	I-Application
Mail	I-Application
for	O
Windows	B-Device
7	I-Device
.	O
</s>
<s>
The	O
free	O
version	O
of	O
yProxy	B-Application
is	O
still	O
available	O
for	O
download	O
via	O
links	O
on	O
the	O
FAQ	O
page	O
of	O
yProxy	B-Application
's	O
main	O
web	O
site	O
.	O
</s>
<s>
yProxy	B-Application
is	O
a	O
non-transparent	O
NNTP	B-Protocol
proxy	B-Application
server	I-Application
.	O
</s>
<s>
A	O
NNTP	B-Protocol
client	O
connects	O
to	O
yProxy	B-Application
.	O
</s>
<s>
yProxy	B-Application
connects	O
to	O
the	O
NNTP	B-Protocol
server	O
.	O
</s>
<s>
When	O
the	O
NNTP	B-Protocol
client	O
makes	O
a	O
request	O
for	O
a	O
news	O
article	O
,	O
yProxy	B-Application
passes	O
the	O
request	O
directly	O
to	O
the	O
server	O
.	O
</s>
<s>
When	O
the	O
server	O
responds	O
with	O
a	O
yEnc	O
encoded	O
attachment	O
,	O
yProxy	B-Application
will	O
decode	O
the	O
yEnc	O
attachment	O
to	O
its	O
raw	O
binary	O
form	O
and	O
reencode	O
the	O
attachment	O
using	O
the	O
older	O
,	O
more	O
widely	O
accepted	O
UUE	B-Device
format	O
before	O
passing	O
the	O
attachment	O
to	O
the	O
client	O
.	O
</s>
<s>
Below	O
is	O
a	O
textual	O
diagram	O
of	O
how	O
yProxy	B-Application
works	O
for	O
the	O
downstream	O
from	O
the	O
NNTP	B-Protocol
server	O
to	O
the	O
NNTP	B-Protocol
client	O
.	O
</s>
<s>
yProxy	B-Application
Pro	O
was	O
initially	O
released	O
in	O
October	O
,	O
2004	O
and	O
is	O
no	O
longer	O
freeware	O
.	O
</s>
<s>
yProxy	B-Application
Pro	O
added	O
new	O
features	O
such	O
as	O
:	O
</s>
