detect several kinds of files. In particular, some phishing emails can be detected using antivirus techniques. However, false positive rates are inherently higher than those of traditional malware detection. There are several unofficial databases for ClamAV: Sanesecurity is an organization that maintains a number of such databases; in addition they distribute and classify a number of similar databases from other parties, such as Porcupine, Julian Field, MalwarePatrol. SecuriteInfo.com also provides additional signatures for ClamAV. ClamAV Unofficial Signatures are mainly used by system administrators to filter email messages. Detections of these groups should be scored, rather than causing an outright block of the "infected" message. Platforms Linux, BSD ClamAV is available for Linux and BSD-based operating systems. In most cases it is available through the distribution's repositories for installation. On Linux servers ClamAV can be run in daemon mode, servicing requests to scan files sent from other processes. These can include mail exchange programs, files on Samba shares, or packets of data passing through a proxy server. On Linux and BSD desktops ClamAV provides on-demand scanning of individual files, directories or the whole PC. macOS macOS Server has included ClamAV since version 10.4. It is used within the operating system's email service. A paid-for graphical user interface is available from Canimaan Software Ltd in the form of ClamXav. Additionally, Fink, Homebrew and MacPorts have ported ClamAV. Another program which uses the ClamAV engine on macOS, is Counteragent. Working alongside the Eudora Internet Mail Server program, Counteragent scans emails for viruses using ClamAV and also optionally provides spam filtering through SpamAssassin. OpenVMS ClamAV for OpenVMS is available for DEC Alpha and Itanium platforms. The build process is simple and provides basic functionality, including library, the clamscan utility, the clamd daemon, and freshclam for update. Windows There are IA-32 and x64 variants of ClamAV available for Windows; additionally, Cisco's Immunet uses ClamAV as its engine. OS/2 A port of ClamAV is available for OS/2 (including eComStation and ArcaOS) with a native UI written in REXX. Graphical interfaces Since ClamAV does not include a graphical user interface (GUI) but instead is run from the command line, a number of third-party developers have written GUIs for the application for various platforms and uses. These include: Linux ClamTk using gtk2-perl; project is named for the Tk libraries that were used when it began KlamAV for TDE (development of the original KDE version was discontinued in 2009).