Which email program are you using?
Windows Mail
Windows Mail 6 (Vista)
Microsoft Outlook
Microsoft Outlook 97, Microsoft Outlook 98, Microsoft Outlook 2000, Microsoft Outlook 2002, Microsoft Outlook 2003
Microsoft Outlook Express
Microsoft Outlook Express 5, Microsoft Outlook Express 6
Netscape 7 Mail
Netscape 7 Mail, Netscape 7.0 Mail, Netscape 7.1 Mail
Netscape Communicator 4.8
Netscape Communicator 4.7, Netscape Communicator 4.8
Apple OS X Mail
Apple Mac OS X Mail