The mailbox to which all quarantined messages should be delivered. This
mailbox can either be on the mail server that the Barracuda Spam Firewall
protects (i.e. yourname@yourdomain.com) or a remote mail server.
Note: If you have the Barracuda Spam Firewall 400 or above you can specify
the quarantine delivery address on a per-domain basis by going to the
DOMAINS tab and clicking the Edit Domains link.