NetMail components are available for SUSE and Red Hat Linux, Novell NetWare v5.1 and later, Novell Open Enterprise Server (in both its OES-Linux and OES-NetWare versions), and Microsoft Windows platforms.
M+NetMail is designed around open standards, including LDAP, PKCS, iCal, POP3, IMAP4, SSL, and S/MIME.