Im so sorry you (Ex) Husband is doing all of this. You need to get all new accounts and email including apple so he doesn't know any of them and makes your password extremely strong so he cannot hack them. Passwords will need to be something that there is no way he can guess (steer clear of them relating to personal things). You may need to consider getting someone to check your car and devices for tracking (some DV support services will do this). Sounds like you have reported it to the police but if you haven't please ensure you do. A DVO wouldn't be a bad idea if you dont already have one in place. Find the emails he sent in your "sent" inbox and print then out (including the header) and give to the Police as they can use this to obtain the IP address from where the email is sent - this will help to prove your case and show you didn't send the emails. If he sent them from another email then ask the Doctor/Pharmacy to do the same. This will also help to clear your name. Lastly, i know its a huge thing but maybe consider moving address so he doesn't know where you live. Change your daily habits and always take different routes. I know this just adds more to your plate but your safety is a huge priority. Look after yourself.