You may see thousands of mails in Qmail queue which are sent from DrWEB-DAEMON@domain.com to email@example.com with Subject: A message has not been checked due to license limitations.
You can skip this mails by editting your DrWeb configuration file.
Edit your DrWeb configuration file.
It may be drweb32_qmail.conf or drweb_qmail.conf
# vi /etc/drweb/drweb_qmail.conf
AdminNotify = no