Automated email copied recipient limit

I am trying to copy recipients on automatic birthday emails and it's saying I've exceeded the recipient limit. I pieced together code I found to make this work but I can't tell from this part where the limit is, if I can up the limit.

var ccRecipients = [];for (var i = 0; i < emailData.length; i++) {var email = emailData[i][0];if (email !== "") {ccRecipients.push(email);