Set Classic UI Reply To in Email Client

[Joshua Jackson]

I have a business rule setup for the compose email function in CSM workspace to utilize the email draft table to set the reply to field to match the from field. The email client in classic ui doesn't utilize the email draft table so the logic to set the reply to to match the from field doesn't work. 

The requirement is to have the reply to email match the from email. Currently the reply to field is not visible as the assumption is that it would be an automatic process rather than having the agents manually populate the field. Is there a way to script the value of the reply to field before the email is sent to match the from field email?