[Mailman-Users] Emails disappear without a trace

[#KAPIL SHARMA#]

Hello Everyone,
 
I am new to Mailman so I hope you will bear with me if you find my questions rather basic. 
 
I have followed all the instructions and have installed Mailman with the option: 
./configure --prefix=/var/mailman --with-mail-gid=mail --with-cgi-gid=apache

The website for the "test" list works fine and when I subscribe, I do get a confirmation email. However, when I reply to this email, absolutely nothing happens. I am also unable to post anything to the "test" mailing list.
 
I have done everything suggested on the FAQs. The cronjob entries look ok. I have added aliases to Sendmail. The only error I can find is in the file /vars/mailman/logs/errors. It has this message that repeats every two minutes:
 
--------------------
Jul 21 13:13:01 2002 qrunner(21734): Traceback (innermost last):
Jul 21 13:13:01 2002 qrunner(21734):   File "/var/mailman/cron/qrunner", line 283, in ?
Jul 21 13:13:01 2002 qrunner(21734):      kids = main(lock)
Jul 21 13:13:01 2002 qrunner(21734):   File "/var/mailman/cron/qrunner", line 253, in main
Jul 21 13:13:01 2002 qrunner(21734):      keepqueued = dispose_message(mlist, msg, msgdata)
Jul 21 13:13:01 2002 qrunner(21734):   File "/var/mailman/cron/qrunner", line 157, in dispose_message
Jul 21 13:13:01 2002 qrunner(21734):      mlist.ParseMailCommands(msg)
Jul 21 13:13:01 2002 qrunner(21734):   File "/var/mailman/Mailman/MailCommandHandler.py", line 123, in ParseMailCommands
Jul 21 13:13:01 2002 qrunner(21734):      precedence = msg.get('precedence', '').lower()
Jul 21 13:13:01 2002 qrunner(21734): AttributeError :  'string' object has no attribute 'lower'
---------------------
 
Can anyone please tell me what I am doing wrong?
 
Thanks,