[Linux-cluster] DSN: failed (delivery failed)

[Mailbot for etexusa.com]

This is a Delivery Status Notification (DSN).

I was unable to deliver your message to
ammextexinc at chesnet.net.

I said 
  RCPT TO:<ammextexinc at chesnet.net>

And they gave me the error;
  550 5.1.1 <ammextexinc at chesnet.net>: Recipient address rejected: User unknown in virtual mailbox table

 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: text/rfc822-headers
Size: 498 bytes
Desc: not available
URL: <http://listman.redhat.com/archives/linux-cluster/attachments/20100620/c0ced365/attachment.bin>