This seems to be from a scammer as my storage reads as 64%. Has anyone run into it before? And is this really from a cox account, i.e. jpcorcoran@cox.net? If so I suggest that COX take action to shut this user down.

From: "COX SUPPORT" <jpcorcoran@cox.net>
To: "Recipients" <jpcorcoran@cox.net>
Date: 06/12/2018 08:19:59 GMT
Subject: Email Account Limitation! (Do Not Ignore)

Dear User,
Your COX mailbox has exceeded it's storage limit as set by our administrator. We have limited your email account activities. In order to keep sending and receiving emails, you will need to validate your account details on our website.

 
This order of validation is only required once you will not be asked again in the future.


Sincerely.
Cox Mail Service Team