This plugin will send trackback to Blog Portal or Blogtal (www.blogtal.com) ONLY when user publish a post or change the post status to publish.
No. This is a plugin for Blog Portal. In order to send trackback to Blog Portal, you will need to be a member of Blog Portal and register your blog(s) in Blog Portal. Registration is free.
You must be a Blog Portal member. To get your secret URL from Blog Portal, login into http://www.blogtal.com. Click on the "Trackback Link" link under the Member Area menu. You will find the secret URL for the registered blog.