Send Receipt Email (or another Template) to more email addresses

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Hi,

We have one escenario where customers can create incidents via techmail. And they can CC other email addresses.
We have a PHP Custom Process that stores in a Custom Field ("email addresses") all the email addresses (the sender & the CC mails), separated by ";" . For example:  [sender; cc1; cc2;...].

We want to send the "Receipt Email" template (or another template, if it makes a difference) not only to the Sender, but to all the email addresses involved in that incident. Is it possible to do that? Right now, the "Send Receipt Email" only sends it to the Principal Sender. We already have a field that stores those emails.