gives following (are pipes supposed to be seekable ?)

Traceback 
(most recent call last):
  File "/opt/roundup/roundup-mailgw", 
line 177, in ?
    sys.exit(main(sys.argv))
  File 
"/opt/roundup/roundup-mailgw", line 157, in main
    return 
do_pipe(handler)
  File "/opt/roundup/roundup-mailgw", line 
32, in do_pipe
    handler.main(sys.stdin)
  File 
"roundup/mailgw.py", line 131, in main
  File 
"roundup/mailgw.py", line 172, in handle_Message
  File 
"roundup/mailgw.py", line 231, in bounce_message
  File 
"/opt/python2.2/lib/python2.2/rfc822.py", line 117, in 
rewindbody
    raise IOError, "unseekable file"
IOError: 
unseekable file