I want to know what is this with my account

hi, i received the mail, Mail-box upgrade required for [email protected]. so i mail you here before 10 minutes after that i received mail for active account i did that but now what can i do.

Any email that says “mail-box upgrade required” is likely phishing. If you clicked a link in that email and entered your details, you should change your mail password immediately (and if you’ve used the same email and password on your Cloudflare account, or any other internet site, then change them too).