Does anyone know "message from someone except 'resend' "?

I created a mailing-list using Majordomo, which is provided by an ISP.
I sent a test message to the mailing-list, but the message has not been sent
to any subscribed users, but an error message is sent to the administrator
(It's me!).
 
The message title is "message from someone except 'resend' " and the e-mail
sent by subscribed user is attached on the e-mail.
And, nothing is wrote in the message body.
 
Has anyone experienced the same problem?
Or does anyone know how I should fix the problem?
 
Please advice me.
 
Thanks,
 
--
Hiroyasu Ishida from Japan