Hello hockeymom98,
Are you using iCloud Mail? If so, see related steps in the following to solve this: If iCloud Mail isn't working - Apple Support
If iCloud Mail isn't working
You can use iCloud Mail in the Mail app on your iPhone, iPad, iPod touch, or Mac, or on iCloud.com on your iPad, Mac, or PC. If you can't access your email, or you can't send and receive messages with your @icloud.com email address, follow these steps.
Things to check first
1. Check the system status of iCloud Mail.
2. Check that you turned on iCloud Mail:
- On your Mac, open the Mail app then choose Mail >Preferences. Click Accounts, then select your iCloud account in the sidebar. Under Account Information, make sure that the account is turned on and the status is online.
- On your iPhone, iPad, or iPod touch, go to Settings > [your name] > iCloud and check that Mail is turned on.
3. Make sure you that haven't exceeded your iCloud storage limit. If you exceed your iCloud storage limit, learn how to make more space available in iCloud.
4. Make sure that you're using the latest version of software on your device.

If you need help sending or receiving mail on your iPhone, iPad, or iPod touch
1. Check your Internet connection. Open apple.com in Safari on your iPhone, iPad, or iPod touch.
2. To see if you can receive mail for your iCloud email on another device, go to iCloud.com on a Mac or PC.
3. Make sure that you turned on Mail in Settings on your iPhone, iPad, or iPod touch. Tap Settings > [your name] > iCloud and turn on Mail.
4. Make sure that new data is pushed to your device automatically. In iOS 14 or later, tap Settings > Mail > Accounts > Fetch New Data, then turn on Push. In iOS 13 or earlier, tap Settings > Passwords & Accounts > Fetch New Data, then turn on Push.
- Send an email to your account to see if Push is working.
- In Fetch New Data, tap your iCloud account and turn on Push. You can only use Push with one account at a time.
5. Turn your device off and back on.
6. If you still can't send or receive mail, turn off the settings in steps 3 and 4, restart your device, then turn them back on.

If you can't access iCloud Mail at iCloud.com
On your iPad, Mac, and PC, you can use iCloud Mail on iCloud.com. On an iPhone, use the Mail app instead.
1. Make sure your browser is up to date. If you're using Safari, update Safari to its latest version.
2. Clear your browser's cache. In Safari, choose Safari > Preferences. Click the Advanced tab. Select "Show Develop menu in menu bar", then close Preferences. Click the Develop menu, then select "Empty Caches." If you're using a different browser, check its help menu for steps.
3. If you can access iCloud Mail from a different location or Internet connection, contact your Internet service provider (ISP) or network administrator. Some Internet configurations intentionally or unintentionally prevent access to certain websites or services, such as iCloud Mail.

Get more help
If you still need help, contact Apple Support.
In case this is happening with another email provider or these steps don't resolve the issue, then it would be best to contact Apple directly, as mentioned above: Apple Support
They'll need to take it from here.
Wishing you well, take care.