Windows 98, 98 Second Edition
Windows Me
Windows 2000 Professional
Windows XP Professional, XP Home Edition(include Service Pack 2)
Windows Vista

Microsoft Internet Explorer 4.0 and above
Netscape Navigator/Communicator 4.0 and above
Netscape 6.0 and above
Microsoft Outlook Express (Coupled with MSIE)
Windows Mail (Coupled with Vista)
Windows Live Mail
Eudora 2.8 and above(include Pro)
Microsoft Outlook 2002, 2003, 2007
Becky! Internet Mail Ver.2
Mozilla Firefox 1.0 and above
Mozilla Thunderbird 1.0 and above

Mac OS 7.5.1 - 9.2.x
TCP/IP 1.1.1 and above
MacTCP 2.0.6 and above
Mac PPP 2.5 and above
FreePPP 2.5v2 and above
Opentransport PPP
Netscape Navigator/Comunicator 4.0 and above
Netscape 6.0 and above
Microsoft Internet Explorer 4.0 and above
Microsoft Outlook Express 4.0 and above
Eudora 2.1.3 and above
Internet Config 1.2 and above

Mac OS X 10.0 and above
Microsoft Internet Explorer 5.1 Preview Release and above
Mail 1.0 and above (with system)
Netscape 6.2 and above
Safari 1.0 and above
Mozilla Firefox 1.0 and above
Mozilla Thunderbird 1.0 and above

Windows CE 2.0 and above (MIPS Edition, SH3 Edition, SH4 Edition)
(Hand-held, Palm, Pro)
Windows Mobile 5.0