We have recently started using your marketing emails to send out our marketing capaigns but noted that our sents + bounced emails do not equal our marketing list recipients. There always seems to be a group of emails completely missing. Turns out many of those are because there is no email, or the email is not marked primary, or for some other reason does not appear in either the sent list or the bounced list. It would be helpful to know who isn't being sent our emails so we can follow up with those indviduals to correct the issue (add an email, mark primary, etc.)