-An [Module] that enables a [Qmail] email server to scan all gateway-ed email for certain characteristics (i.e. a content scanner). It is typically used for its anti-[Virus] protection functions, in which case it is used in conjunction with external [Virus] scanners. but also enables a site (at a server/site level) to react to email that contains specific strings in particular headers, or particular attachment filenames or types (e.g. *.VBS attachments). It also can be used as an archiving tool for auditing or backup purposes. [QmailScanner] is integrated into the mail server at a lower level than some other [Unix]-based virus scanners (i.e [ClamAv], resulting in better performance. It is capable of scanning not only locally sent/received [Email], but also email that crosses the server in a relay capacity.