Sending the signal off actually counts as getting rid of it now. I sent it in intentionally trying to see what happens and I still got the "GOOD" email.
Here just to confirm what ArsonistHotdog said. I too was trying to trigger the ending to see what it did, but after shipping it I got the "GOOD" email (0.7.0 Super experimental).
Edit: actually I receive the email even if I keep the disk after playing it. I think I cannot trigger the ending at all.
