We are starting to see very convincing cPanel phishing emails circulating. The subject line indicates that your inode limit has been reached and you need to login and increase that limit or bad things will happen. If you use the attached form, you will give up your cPanel credentials to the criminal, which could have very bad consequences for your website and email accounts.
The email is mimicking a legitimate cPanel notification with a convincing amount of accuracy. If you receive this email please delete it immediately.