Hello Enterprize1701d,
Welcome to Apple Support Communities! It sounds like you need help withmail on your iPhone. We completely understand why you'd reach out, and are happy to help.
Generally, whenever you see this, it's due to the account itself or the email provider settings. Some providers actually will need you to have a specific code for other devices.
Have you had a look at this article? I can help you locate your mail settings: Mail - Official Apple Support
We also recommend reaching out to your provider to see if the settings are correct, and have them troubleshooting from that end.
Please have a look and let us know if this helps!
Cheers!