More info in broken code email

I need more information in the broken code email for the following reasons:

1. To differentiate emails sent from between developing servers and the running instance.
2. Let me know when exactly the email was sent. My email service provider will postpone the sending of some emails when there are a huge amount, which exceeds the allowed amount of emails to be sent at a given time interval, to be sent to a single recipient. This will help me to know whether the problem reported is a new problem.
3. Let me know which students' code is problematic, along with the URL of that page.