A 3 day notice wouldn't apply here as it is usually to Pay or Quit. You don't want them to pay, you want them out. There are other forms of 3 day notices but they don't appear to apply here. Because they had a 1 year lease, a 60 day notice is needed. The notice has to contain certain things so the email you sent may not be considered valid. To that point, I'm not even certain email is acceptable or if it has to be in letter form. When you sent them the email, what did it say (leaving out names)?

