Windows
Windows Mail for Vista
Outlook Express 6.0
Outlook Express 5.0
Outlook 2007
Outlook 2003
Outlook 2002
Outlook 2000
Netscape 7.0
Netscape 6.x
Thunderbird 1.5
Eudora 7
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Mac OS X
Mail for Mac 1.3 (and up)
Mail for Mac 1.2
Mail for Mac 1.1
Netscape 7
Netscape 6.x
Eudora 5.x and above
Entourage 2004
Entourage
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Mac (Classic)
Outlook Express 5.0
Entourage 2001
Netscape 7
Netscape 6
Eudora 5.x and above
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