Messages that show in green in the Quarantine+ tool have been accepted for delivery by your mail server. We store delivery logs for each message as provide proof of delivery:
This proof of delivery, which usually includes tracking information, is provided by your mail server. The highlighted portion of the logs include the raw response provided by your mail server, enclosed in parenthesis:
Inside the raw response, most mail servers provide tracking information (highlighted in green in this article). This will usually be a string of numbers and characters (sometimes including hyphens) and is provided by your mail server to make it easier to trace the delivery of the message.
The tracking information may look slightly different based on what type of mail server you have, but it will always be in the parenthesis near the end of the delivery log. Here's a few examples:
Copy the tracking information and send it to your mail server administrator and ask them to trace the message to discover where the message went after it was delivered to your mail server.