Email BCC feature in Adobe Campaign Classic

Hi All,

Failing to send emails to BCC address.

We have hybrid implementation where we are sending emails from mid sourcing server managed by Adobe.

Made the following changes for this

1. Made 2 changes to server config in midsourcing, set archivingType = 1, and smtpbccaddress=<<bccEmail>. 

2. Checked the checkbox Email BCC in delivery template in marketing server.

Do we need to change anything in marketing server config file?

And what is the best way to debug the issue, could not find much information in delivery logs.