Enable ability to send a single email to multiple recipients

In our line of work, we need to send a single email to a group of recipients so those recipients can thread off the email and have a conversation. This is particularly true for our enterprise customers. It would be very helpful if we could pass a comma separated list of emails in our event payload to send a single transactional email to several contacts. Because of this lack of functionality, we can't use Vero to send transactional emails to our larger, more valuable customers.