Hello WannaAnswer,
For issues with your email the steps on this page may be able to resolve things: If you can’t send email on your iPhone, iPad, or iPod touch - Apple Support
Before you begin
There are a few things to keep in mind and check:
•When you make an iOS or iPadOS backup in iCloud or iTunes, it backs up your mail settings, but not your email. If you delete or change your email account settings, previously downloaded email might be removed from your device.
•Make sure that your device is connected to the internet.
•Check with your email service provider to find out if there's a service outage.
•If you can't access your email, or you can't send and receive messages with your @icloud.com email address, learn what to do.
As the page notes near the end, "If the steps in this article don't help, contact your email service provider for more information." This will be important as it's possible there could be an "app-specific password" set up for email accounts, which they'd need to assist with.
Cheers.
