Your system has been compromised and hacker has video of you pleasing yourself on an adult site. If you don't send cryptocurrency to this address video will be sent to all your contacts. Breathe and consider this a lie.
Your account storage and/or Emails can't be delivered. These could be legitimate but do not click links in the email to find out. Instead login to your webhost control panel for your domain eg: yourdomain.com/cpanel to check confirm available disk space. Show email source/headers to see where email actually came from not where email said it came from. If you do not recognize origin or any of the server host names the email passed thru it is likely phishing for your email login credentials. Perhaps using short URLs (bit.ly) to trick you into thinking you are clicking a link to your web host, web mail or control panel.
Telephone calls claim your utility will shut off today unless you pay. Very few if any utility companies will make this call. Hell most can't even handle the incoming calls on a daily basis without subjecting you to several minutes hold time. Thus it is reasonable to consider even though you may currently be late paying the utility that this call is fraud. It likely is. They trick you into giving them payment to avoid immediate interruption.