Mitto Email Job - Dynmically Generated Email list

For a Mitto email job is it possible to dynamically generate the recipient list?

The Mitto (outgoing) email job currently only supports a “hard coded” list of recipients in the job config.

For example:

{
  ...
  "mail_bcc": [],
  "mail_cc": [],
  "mail_to": [
    "someone@hostname.com",
    "frank@email.com"
  ],
  ...
}

How would you want to dynamically generate the list?