PostBox is a new email client which is under beta stage now. This is based on the Mozilla technology.

This will allow you to index the links, images attachments etc and which can be found as a new tabs in the interface.

Here is teh features from the website

1. Compose Sidebar: Get fast access to your email content when you need it most - writing messages. A handy Compose Sidebar lets you find attachments, images, and links directly within a new message window, which makes it easy to do things like resend project documents or incriminating photos from the company party.

2. Contacts Panel: The inline Contacts Panel provides fast access to address book data and a palette of useful searches and actions.

3. Tabbed Mail Browsing: Like a Web browser, Postbox lets you view your message content in tabs - enabling you to create an efficient workspace for everything you’re working on.

4. Conversation Views: Postbox enables you to view and process messages by conversation.

5. Web Connectors: To share content online, select some content and choose an online service.

6.  Anti-Phishing and Malware Services: Postbox helps protect you from viruses, spyware, trojan horses and more by checking URLs that are sent to you against a database of suspected phishing or malware sites.

here is the complete feature list

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