Hello Flysurfer1,
Welcome to Apple Support Communities!
It sounds like you’re unable to use a mail account in the Mail app on your iPhone. We’d be happy to help. To better understand the issue, we’d like to ask a few questions.
Could you please provide some more details about what isn’t working?
Are you unable to send and/or receive mail using that mail account?
Are you seeing a specific message when trying to send or receive mail?
Do you have other mail accounts (different domain/provider) added in your Mail app on your iPhone? Are they working?
We’d recommend trying the steps in the following resources:
If you can’t send email on your iPhone, iPad, or iPod touch
If you can't receive email on your iPhone, iPad, or iPod touch
If your email service provider confirmed the settings for your account, you can also try to remove the account and then set it up again. Check out the steps under the section titled “Remove your email account and set it up again” in the resources provided above.
Take care.