FileLight.com

MailStore Home enables you to backup all your email messages from multiple applications and accounts into one secure and persistent archive. Lightning-fast search, one-click backup, powerful export - all information is is at your fingertips anytime. Supported email clients include Outlook, Windows Mail, Outlook Express, Thunderbird, Exchange, as well as POP/IMAP accounts (including all webmail services that IMAP or POP support such as Gmail).