In order to disable the notifications you can follow the steps.
Login to the server as root.
Edit /etc/drweb/drweb_qmail.conf to eliminate receiving notification messages.
vi /etc/drweb/drweb_qmail.conf [VirusNotifications] SenderNotify = no AdminNotify = no RcptsNotify =no
If the file “drweb_qmail.conf” not present under the directory “/etc/drweb/”, then first create the file.
/etc/init.d/drwebd restart
The notifications will now stop filling the email queue.