Mail PassView Portable is a small password-recovery tool that reveals the passwords and other account details for all popular email clients. Installer version available.

Mail PassView Portable reveals the account details for the following email clients:

Outlook Express

Microsoft Outlook 2000 (POP3 and SMTP Accounts only)

Microsoft Outlook 2002/2003/2007/2010 (POP3, IMAP, HTTP and SMTP Accounts)

Windows Mail

Windows Live Mail

IncrediMail

Eudora

Netscape 6.x/7.x (If the password is not encrypted with master password)

Mozilla Thunderbird (If the password is not encrypted with master password)

Group Mail Free

Yahoo! Mail - If the password is saved in Yahoo! Messenger application.

Hotmail/MSN mail - If the password is saved in MSN/Windows/Live Messenger application.

Gmail - If the password is saved by Gmail Notifier application, Google Desktop, or by Google Talk.

For each email account, the following fields are displayed: Account Name, Application, Email, Server, Server Type (POP3/IMAP/SMTP), User Name, and the Password.

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Version History for Mail PassView Portable:
http://www.nirsoft.net/utils/mailpv.html