Here is Exchange talking to a 'real' nntp server.. just an FYI:

200 news.vmware.com InterNetNews NNRP server INN 1.7.2 08-Dec-1997
ready (posting ok).
mode reader
200 news.vmware.com InterNetNews NNRP server INN 1.7.2 08-Dec-1997
ready (posting ok).
date
111 20050901050951
list
215 Newsgroups in form "group high low flags".
test 0000000532 0000000532 y
vmware.announce 0000000096 0000000005 m
vmware.for-linux.configuration 0000020986 0000000012 y
vmware.guest.windows95 0000001391 0000000009 y
vmware.guest.windows98 0000005112 0000000005 y
vmware.guest.windows-nt 0000002399 0000000004 y
vmware.guest.linux 0000009157 0000000001 y
vmware.guest.misc 0000005612 0000000006 y
<*snip*>
.
newnews * 050830 045411 GMT
230 New news follows
<df1uae$2jc$1@...>
<df4k5o$ag0$1@...>
<df4liq$bo1$1@...>
<df4loj$bo1$2@...>
<df4m22$c6d$1@...>
<df4nuk$doo$1@...>
<pan.2005.08.31.18.18.16.603426@...>
<df53m2$rbq$1@...>
.
article <df1uae$2jc$1@...>
220 0 <df1uae$2jc$1@...> article
Path: news.vmware.com!not-for-mail
From: Brant <btpoggensee@...>
Newsgroups: vmware.guest.linux
Subject: Copy, Paste and File Transfer
Date: Tue, 30 Aug 2005 10:34:43 -0500
Organization: VMware, Inc.
Lines: 5
Message-ID: <df1uae$2jc$1@...>
NNTP-Posting-Host: 12-208-3-220.client.insightbb.com
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
<*snip*>

--- In nntprss@yahoogroups.com, "cowmix3" <mmarch@g...> wrote:
> When you first set up a feed.. here is the transcript:
>
>
> 200 nntp//rss v0.5-beta-1 news server ready
> mode reader
> 200 Hello, you can post
> date
> 500 command not recognized
> list
> 215 list of newsgroups follows
> BugsOpen 25 1 n
> WikiChanges 15 1 n
> SvnAdds 28 1 n
> Company 89 1 n
> BugsClosed 18 1 n
> .
> newnews * 050602 003507 GMT
> 230 list of new articles by message-id follows
> .
> quit
> 205 closing connection - goodbye!