Undelivered Mail Returned to Sender

[Mail Delivery System]

This is the Postfix program at host www.haskell.org.

I'm sorry to have to inform you that the message returned
below could not be delivered to one or more destinations.

For further assistance, please send mail to <postmaster>

If you do so, please include this problem report. You can
delete your own text from the message returned below.

			The Postfix program

<sandra at haskell.org>: unknown user: "sandra"
-------------- next part --------------
Skipped content of type message/delivery-status-------------- next part --------------
An embedded message was scrubbed...
From: libraries at haskell.org
Subject: hello
Date: Mon, 26 Jan 2004 19:23:16 -0600
Size: 32342
Url: http://haskell.org/pipermail/libraries/attachments/20040126/6bf5b5a6/attachment.eml