QUARANTINE Mails: Add TAG with reason for quarantine?

[booktrunk]

Is there any way without having to look directly at the logs to see why email has been quarantined?

We have thousands and would love to be able to add a reason to the emails our users get x times a day telling them an email is being blocked. 

We also want this so that we can start working out why so many legit emails are getting stopped so we can hopefully stop them being blocked in the first place.

Ideally in the email they get x times a day there would be a column with reason or it will be tagged onto the subject is this possible in any way?