Vote for MailBasketMD
MailBasketMD redirects all misaddressed SMTP emails to a "catch-all" mailbox on the exchange server server without sending a nondeliverable report (NDR) to the sender. MailBasketMD can also be configured to delete misaddressed email rather than redirecting it to an alternate mailbox.
MailBasketMD can also redirect these misaddressed messages to an address outside of the Exchange server or to a mail-enabled Exchange public folder.