Microsoft Windows 2000 / XP
- Microsoft Outlook Express 6
- Microsoft Outlook 2000
- Microsoft Outlook 2002
- Microsoft Outlook 2003
- Microsoft Outlook 2007
- Mozilla Thunderbird
- Qualcomm Eudora
Macintosh Apple OS X
- Microsoft Entourage
- Mozilla Thunderbird
- Qualcomm Eudora
- Apple Mail (IMAP not recommended)
Linux
- Mozilla Thunderbird
