/usr/bin/postnews is in postnews 0.5.3-3.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118  | #!/usr/bin/python
# postnews 0.5.3 - post a usenet article
#
# (C) 2001 by Michael Waschbuesch <waschbuesch@users.sourceforge.net>
# http://sourceforge.net/projects/postnews/
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
# Juhuu! Mein erstes Python-Programm :o)
import sys
import nntplib
import getopt
def main():
	#get arguments and options
	try:
		opts, args = getopt.getopt(sys.argv[1:], "hf:p:vr", ["help", "file=", "port=", "user=", "pass=", "verbose", "readermode"])
	except:
		usage()
		sys.exit(2)
	#parse arguments
	if len(args) !=1:
		usage()
		sys.exit(2)
	    
	server = args[0];
	#parse options
	file = sys.stdin
	port = 119
	user = ""
	password = ""
	verbose = 0
	readermode = None
	
	for o, a in opts:
		if o in ("-h", "--help"):
			usage()
			sys.exit()
		if o in ("-f", "--file"):
			try:
				file = open(a)
			except IOError:
				sys.stderr.write("File not found: "+a+"\n")
				sys.exit(2)
		if o in ("-p", "--port"):
			try:
				port = int(a)
				if port < 0 or port > 65535:
					raise ValueError
			except ValueError:
				sys.stderr.write("Invalid port number: "+a+"\n")
				sys.exit(2)
		if o == "--user":
			user = a
		if o == "--pass":
			password = a
		if o in ("-v", "--verbose"):
			verbose = 1
		if o in ("-r", "--readermode"):
			readermode = 1
			
	#post message
	if verbose:
		print "Connecting to Server..."
	try:
		s = nntplib.NNTP(server, port, user, password, readermode)
	except Exception, e:	# it can throw a class exception...
		sys.stderr.write("Can't connect to server: "+server+"\n")
		sys.stderr.write(str(e)+"\n")
		sys.exit(2)
	except:			# ... or a string exception
		sys.stderr.write("Can't connect to server: "+server+"\n")
		sys.stderr.write(sys.exc_info()[1]+"\n")
		sys.exit(2)
	if verbose:
		print "Posting article..."
	try:
		s.post(file)
	except Exception, e:	# it can throw a class exception...
		sys.stderr.write("Can't post the given input.\n")
		sys.stderr.write(str(e)+"\n")
		sys.exit(2)
	except:			# ... or a string exception
		sys.stderr.write("Can't post the given input.\n")
		sys.stderr.write(sys.exc_info()[1]+"\n")
		sys.exit(2)
            
	s.quit()
def usage():
	print "postnews 0.5.3 - (C) 2001 by Michael Waschbuesch <MichaelWaschbuesch@web.de>"
	print ""
	print "Usage: postnews [OPTIONS] SERVER"
	print "Post a usenet article (including headers) from stdin onto SERVER."
	print "Article must at least contain the headers 'From:', 'Newsgroups:' and 'Subject:',"
	print "a newline and a body."
	print ""
	print "Options: -h, --help          display this text"
	print "         -v, --verbose       be verbose"
	print "         -f, --file=FILE     read file instead of stdin"
	print "         -p, --port=PORT     port number"
	print "             --user=NAME     user name"
	print "             --pass=PASSWD   password"
	print "         -r, --readermode    send MODE READER before authentication"
if __name__ == "__main__":
	main()
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