Send invoice mail to different email address and not to customer with specific customer group

[Anonymous]

Hello there,

this should be possible in a programmable way. Many resources state to edit a local copy of Mage/Sales/Model/Order.php or Mage/Sales/Model/Order/Invoice.php but I couldn't figure it out, yet.

This is my dream:

1. Customer with specific customer group creates an order.
2. The invoice mail with the invoice attachment should not be send to this customer.
3. Instead, the invoice email should be send to a custom email address.

Is there a way to achieve this?