The Postback Log shows the status of postbacks–notifications of user status changes sent from Sailthru to your company’s sever.

The table for this report lists the Email address of the user, the Action attributed to that user/email (including an optout from a Sailthru hosted page, hardbounce, or signup verification), URL to which the data was sent, your server’s Response code sent back to Sailthru, and Time.