Problem with mail

Mentosssp Said:

"Problem with mail: I can't clear my mail.I deleted all the emails.I even deleted my mail, nothing helps.It takes me 9 gigabytes"

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Troubleshooting iPhone Mail:

A. New App Password:

Note that you would need a new App Password, being that Mail is a third party app. You cannot log in using your eMail address password. As an example, go here for gmail: Sign in Using App Passwords - Gmail Help - Google Support

B. Use WiFi:

I see you are using cellular. What happens when you use WiFi? Any difference?

Mentosssp Said:

"I'm telling you about your mail!Built-in from apple, it's full and I can't clean it.see the photo attached"

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Archive your Mail:

Archive your eMail library so that it is backed up, and none is lost. Once exported, trash what is in there. See Here: Import or export mailboxes in Mail on Mac - Apple Support