email function of this forum doesn't work!

Is this normal ??? (see below)

Your message did not reach some or all of the intended recipients.

  Subject:	[gpg4win-open-discussion][1135] RE: Transferring a private key
  Sent:	9/14/2007 10:14 AM

The following recipient(s) could not be reached: on 9/14/2007 10:16 AM
        The e-mail system was unable to deliver the message, but did not report a specific reason.  Check the address and try again.  If it still fails, contact your system administrator.
        < #5.0.0 X-Postfix; unknown user: "noreply">