[Mailman-Users] TypeError: read-only buffer ...

[Joseph Chin]

hi folks,

I have been using Mailman on Red Hat Linux 5.x system since b4 (just
upgraded all systems to b9 today), and most things work as advertised.
However, there is one problem that won't go away ...

An application uses a Java SMTP applet to send notices via email. It works
fine unless the recipient address is that of a Mailman list. The following
is an excerpt from the bounced mail:

----- The following addresses had permanent fatal errors ----- 
|"/home/mailman/mail/wrapper post product-support" 
(expanded from: <support at somedomain.com>)
----- Transcript of session follows ----- 
Traceback (innermost last): 
File "/home/mailman/scripts/post", line 65, in ? 
current_list.Post(msg) 
File "/home/mailman/Mailman/MailList.py", line 1135, in Post 
sender = self.FindUser(msg.GetSender()) 
File "/home/mailman/Mailman/Message.py", line 122, in GetSender 
return string.lower(mail_address) 
TypeError: read-only buffer, None 
554 |"/home/mailman/mail/wrapper post product-support"... unknown mailer
error 1

The Mailman list in question works fine when using "normal" mail agents,
such as Eudora, Outlook, direct SMTP conversation via telnet to port 25, etc.

Any idea?

Regards
Joe