That is almost certainly not the case. It would take a very good programmer to do that and from what is known to date he was not even a very good administrator, a career path which requires much less skill than programming.
To strip classification codes automatically that would have to be done at the SMTP level before it got to the server in order to maintain deniability.
Are the classification codes stored/transmitted in the SMTP headers? Is that a known fact, or an opinion?
When they say 'messages were marked classified' or 'weren't marked classified' or 'had the classification stripped' ... is that equal to saying 'in/from the SMPT headers'?
I ask out of curiosity ... I'm a software developer so matters to me ... if that's a true/complete/accurate thing to say. Thanks!