What is the VBL
The VBL is a virus host blacklist which is provided by the Internet Defence team. The database is a list of all IP addresses from which email containing a virus, or phishing/fraud email, has been sent from. As with the SBL, the identification is an automated process - no user preferences are involved in making the decision about whether an email contains a virus or not. It is an aged database, so no IP’s remain in the database over 3 days, unless the timeout is reset by receiving another virus from the same address.