As always, the answer to any question about anything is that it depends. What was the original violation? Valid?
If valid, pay the fine and apologise.
If not valid, apologise for the email and explain why you don't think it was valid and make up some bullshit story of why you were out of sorts that day.
How angry was the email and are the additional violations valid?
(same as above)
You aren't going to win this one, but if you prostrate yourself enough, you may mitigate the damage.