Hi @campaignap    Please find a similar thread with the solution. You can use approvals in workflows as well as while using the email delivery activity. set default reviewer group Hope this helps.   Thanks

Hi @saurabh99    You  can use the attribute "No longer contact by any channel" to filter out the blacklisted recipients.    

Hi @campaignap    You can find the approvals tab in Email delivery activity while creating a campaign or through the edit tab in campaigns.  1. Email Delivery Activity.     2. Campaign Workflows --> Edit