I understand that this error is related to the -f "sender" option not being
inserted via sendmail. 

Here is the problem; the spammer is sending the spam to "[EMAIL PROTECTED]" 
FROM a non-existing address "[EMAIL PROTECTED]" - so tmda, it seems is sending 
the
mail to [EMAIL PROTECTED] WITHOUT the -f "sender" inserted.

If someone sent the email to "[EMAIL PROTECTED]" from outside the email would be
rejected immediately because it does not exist. Since the email attempt is being
send via tmda from WITHIN the server, it seems to err this way. For some reason
each time this happens I get the message repeated hundreds of times in
"pending". If anyone if familiar with this bug, it would be great to get some
feedback. That aside, is there any way to check the sendmail parameters that
tmda is using when requesting confirmation?

Here is the tail of debug;

Uncaught Python 2.4.3 Exception (Wed Apr  4 15:32:59 2007):
-----------------------------------------------------------
Traceback (most recent call last):
  File "/usr/local/bin/tmda-filter", line 53, in ?
    execfile(os.path.join(execdir, 'tmda-rfilter'))
  File "/usr/local/bin/tmda-rfilter", line 860, in ?
    main()
  File "/usr/local/bin/tmda-rfilter", line 856, in main
    'bounce_incoming.txt')
  File "/usr/local/bin/tmda-rfilter", line 473, in do_default_action
    bouncegen('request')
  File "/usr/local/bin/tmda-rfilter", line 743, in bouncegen
    send_bounce(bounce_message, mode)
  File "/usr/local/bin/tmda-rfilter", line 444, in send_bounce
    ar.send()
  File "/usr/local/lib/python2.4/site-packages/TMDA/AutoResponse.py", line 227,
in send
    self.recipient, Defaults.BOUNCE_ENV_SENDER)
  File "/usr/local/lib/python2.4/site-packages/TMDA/Util.py", line 602, in 
sendmail
    pipecmd(cmd, msgstr)
  File "/usr/local/lib/python2.4/site-packages/TMDA/Util.py", line 402, in 
pipecmd
    raise IOError, \
IOError: failure delivering message to command "('/usr/sbin/sendmail', '-i',
'-f', '<>', '--', '[EMAIL PROTECTED]')" (command "('/usr/sbin/sendmail', '-i', 
'-f',
'<>', '--', '[EMAIL PROTECTED]')" exited 67  ())

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