Postbox Express Quickstart Guide
The Contacts Card lets you search for messages, attachments, images or links by contact! Simply click on a contact within the message header to bring up the Contacts Card.
The Contacts Card will first summarize any contact details detected from your address book or online sources.
Click on a phone number, email or IM address to connect with the contact using applications such as Skype, AOL/iChat, or Postbox Express.
Finally, you can perform actions on the contact. Copy email will copy the default email address to the clipboard, edit... will enable you to modify contact details, and create filter... will allow you to create a new rule based upon this contact.