<s>
Crossposting	B-Application
is	O
the	O
act	O
of	O
posting	O
the	O
same	O
message	O
to	O
multiple	O
information	O
channels	O
;	O
forums	B-Application
,	O
mailing	O
lists	O
,	O
or	O
newsgroups	B-Application
.	O
</s>
<s>
This	O
is	O
distinct	O
from	O
multiposting	B-Application
,	O
which	O
is	O
the	O
posting	O
of	O
separate	O
identical	O
messages	O
,	O
individually	O
,	O
to	O
each	O
channel	O
,	O
(	O
a	O
forum	O
,	O
a	O
newsgroup	B-Application
,	O
an	O
email	O
list	O
,	O
or	O
topic	O
area	O
)	O
.	O
</s>
<s>
Enforcement	O
actions	O
against	O
crossposting	B-Application
individuals	O
vary	O
from	O
simple	O
admonishments	O
up	O
to	O
total	O
lifetime	O
bans	O
.	O
</s>
<s>
In	O
some	O
cases	O
,	O
on	O
email	O
lists	O
and	O
forums	B-Application
,	O
an	O
individual	O
is	O
put	O
under	O
a	O
Stealth	O
Ban	O
where	O
their	O
posts	O
are	O
distributed	O
back	O
to	O
them	O
as	O
if	O
they	O
were	O
being	O
distributed	O
normally	O
,	O
but	O
the	O
rest	O
of	O
the	O
subscribers	O
are	O
not	O
sent	O
the	O
messages	O
.	O
</s>
<s>
Crossposting	B-Application
to	O
groups	O
that	O
are	O
irrelevant	O
to	O
the	O
message	O
posted	O
could	O
be	O
considered	O
spamming	O
.	O
</s>
<s>
Moreover	O
,	O
excessive	O
crossposting	B-Application
is	O
generally	O
considered	O
bad	O
form	O
because	O
it	O
multiplies	O
traffic	O
without	O
adding	O
any	O
new	O
content	O
.	O
</s>
<s>
In	O
Usenet	B-Application
,	O
the	O
destination	O
newsgroup(s )	O
for	O
a	O
particular	O
message	O
is	O
indicated	O
in	O
the	O
"	O
Newsgroups	B-Application
:	O
"	O
line	O
.	O
</s>
<s>
Most	O
commonly	O
,	O
just	O
one	O
newsgroup	B-Application
is	O
specified	O
.	O
</s>
<s>
However	O
,	O
it	O
is	O
possible	O
to	O
specify	O
that	O
the	O
message	O
is	O
intended	O
for	O
more	O
than	O
one	O
newsgroup	B-Application
.	O
</s>
<s>
In	O
this	O
case	O
,	O
the	O
message	O
will	O
be	O
visible	O
both	O
in	O
the	O
sci.space	O
and	O
comp.simulation	O
newsgroups	B-Application
.	O
</s>
<s>
A	O
crossposted	O
message	O
takes	O
up	O
less	O
server	O
storage	O
space	O
,	O
and	O
creates	O
less	O
network	O
traffic	O
,	O
than	O
if	O
individual	O
messages	O
had	O
been	O
posted	O
to	O
multiple	O
newsgroups	B-Application
.	O
</s>
<s>
Usenet	B-Application
reader	O
software	O
can	O
intelligently	O
track	O
whether	O
or	O
not	O
the	O
user	O
has	O
already	O
viewed	O
the	O
message	O
in	O
one	O
newsgroup	B-Application
,	O
even	O
though	O
they	O
might	O
currently	O
be	O
looking	O
at	O
another	O
newsgroup	B-Application
.	O
</s>
<s>
the	O
message	O
's	O
content	O
was	O
multiposted	O
)	O
,	O
each	O
would	O
appear	O
to	O
be	O
a	O
new	O
unread	O
message	O
in	O
each	O
newsgroup	B-Application
.	O
</s>
<s>
Replies	O
to	O
crossposted	O
messages	O
will	O
be	O
,	O
by	O
default	O
,	O
also	O
crossposted	O
,	O
and	O
so	O
conversations	O
can	O
occur	O
between	O
readers	O
of	O
the	O
multiple	O
newsgroups	B-Application
without	O
any	O
confusion	O
,	O
so	O
long	O
as	O
nobody	O
"	O
breaks	O
the	O
thread	O
"	O
by	O
changing	O
the	O
groups	O
they	O
post	O
their	O
reply	O
to	O
.	O
</s>
<s>
This	O
enables	O
readers	O
of	O
one	O
of	O
the	O
newsgroups	B-Application
in	O
the	O
crosspost	B-Application
to	O
provide	O
corrections	O
,	O
etc	O
.	O
</s>
<s>
to	O
information	O
posted	O
by	O
somebody	O
in	O
a	O
different	O
newsgroup	B-Application
.	O
</s>
<s>
By	O
adding	O
a	O
"	O
Followup-To	B-Application
:	O
"	O
line	O
a	O
poster	O
can	O
indicate	O
that	O
answers	O
to	O
his	O
post	O
should	O
be	O
posted	O
to	O
another	O
set	O
of	O
newsgroups	B-Application
than	O
those	O
listed	O
by	O
the	O
"	O
Newsgroups	B-Application
:	O
"	O
line	O
.	O
</s>
<s>
It	O
helps	O
to	O
avoid	O
time	O
wasted	O
on	O
writing	O
a	O
reply	O
which	O
has	O
,	O
in	O
essence	O
,	O
been	O
posted	O
on	O
another	O
newsgroup	B-Application
but	O
which	O
the	O
replier	O
has	O
n't	O
seen	O
because	O
he/she	O
does	O
n't	O
read	O
that	O
newsgroup	B-Application
or	O
has	O
n't	O
yet	O
looked	O
there	O
.	O
</s>
<s>
Crossposting	B-Application
is	O
usually	O
practiced	O
when	O
material	O
is	O
relevant	O
and	O
of	O
interest	O
to	O
the	O
readers	O
of	O
more	O
than	O
one	O
newsgroup	B-Application
.	O
</s>
<s>
However	O
,	O
sometimes	O
it	O
is	O
used	O
maliciously	O
to	O
begin	O
a	O
thread	O
between	O
newsgroups	B-Application
whose	O
readers	O
are	O
likely	O
to	O
have	O
violently	O
differing	O
opinions	O
,	O
in	O
the	O
hope	O
of	O
provoking	O
a	O
conflict	O
.	O
</s>
<s>
Crossposting	B-Application
to	O
more	O
than	O
a	O
small	O
number	O
of	O
newsgroups	B-Application
is	O
likely	O
to	O
be	O
counterproductive	O
.	O
</s>
<s>
A	O
commonly	O
suggested	O
limit	O
is	O
three	O
newsgroups	B-Application
.	O
</s>
<s>
Some	O
NNTP	O
servers	O
drop	O
posts	O
which	O
are	O
crossposted	O
to	O
more	O
than	O
a	O
set	O
number	O
of	O
newsgroups	B-Application
,	O
especially	O
if	O
no	O
"	O
Followup-To	B-Application
:	O
"	O
line	O
exists	O
.	O
</s>
