Glad to hear things are getting better.
1. Inline signature reports can be found in /etc/MailScanner/en. Edit to customize to your liking.
2. Edit the below line in /var/www/mailscanner/conf.php and make sure you've entered the full email address, including the domain name:
3. Chapter 12 explains how to pull out the email addresses automatically.
Let me know how it turns out.