[Mailman-Users] Help ! (not work with & symbol)

[LE Van Dong]

  Hi all !

I created one mailing list ,its name a&b 
When i post to list (a&b at blabla.com),i got error msg :

----------

<a&b at blabla.com>: Command died with status 127:
    "/var/lib/mailman/mail/wrapper post r&d". Command output: sh: d:
command
    not found Mailman error: post got bad listname: r

-----------

How can i correct it ?

Thanks,
Dong

Notes : -  i need to use & symbol :-( 
        - debian potato
        - mailman 2.0.5