As part of the MS Outlook email recipient ‘To list’, the number of email recipients varies by customer and can vary from 1 contact to up to 9 contacts. For those familiar with the term ‘Rolodex’, (customers/contact_names/email_address), I want to automatically sequence through the ‘Rolodex table’ and send one email to each identified customer (based on a flag that is set) and TO: each respective contact for that customer (1 to 9 contacts_email_addresses). 

What is the best way to address the ‘dynamic list’ of email contacts per customer that need to get set up in the MS Outlook module?

I have seen the example in the community of using the Group function in the CSV module, but that example was specific to 1 role (1 recipient in the MS Outlook 365) vs a varied list of contact_email_addresses, depending on the customer.