ClamMail

ClamMail is small POP3 proxy with integrated ClamAV engine (libclamav) which first purpose was to replace old commercial antivirus proxy not working well. ClamMail components packed for Windows 98 are below 1MB in size together (installer is bigger becouse NT/XP service and translations are also inside).
Price USD 0
License Free to try
File Size 1.41 MB
Version 1.3.5
Operating System Windows, Windows NT, Windows 2000, Windows XP
System Requirements None