I had this problem, everytime a mail is sent to my address the mail system will sent a fail message to sender. Anyone had this problem? Below is the fail message. Thks

This message was created automatically by mail delivery software (Exim).

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

  pipe to |/usr/local/cpanel/3rdparty/mailman/mail/wrapper post robin_atit.biz
    generated by robin@atit.biz
    Child process of virtual_address_pipe transport returned 1 from command:
    /usr/local/cpanel/3rdparty/mailman/mail/wrapper

The following text was generated during the delivery attempt:

------ pipe to |/usr/local/cpanel/3rdparty/mailman/mail/wrapper post
robin_atit.biz
       generated by robin@atit.biz ------

Mailman error: post got bad listname: robin_atit.biz