Mail not syncing

Hello JSims,

Welcome to Apple Support Communities. 

We understand that your email is not syncing across your Apple devices. We are happy to help.

We recommend ensuring that you have the correct mail server settings here: iCloud Mail server settings for other email client apps - Apple Support

"Do you need these mail server settings?

With these iCloud Mail server settings, you can set up your email client app to send and receive email with your iCloud Mail account. You need these server settings when you manually configure your email client app.

You don't need these mail server settings if you meet iCloud system requirements and can use any of these setup methods:

• Use iCloud Preferences on your Mac in OS X Lion 10.7.4 or later.
• Use iCloud for Windows on your PC in Microsoft Windows with Outlook 2010 through Outlook 2016. Set up two-factor authentication and generate an app-specific password to use for iCloud Mail.
• Use iCloud settings on your iPhone, iPad, or iPod touch with iOS 7 or later.

iCloud Mail server settings

• iCloud Mail uses the IMAP and SMTP standards supported by most modern email client apps. iCloud Mail does not support POP.
• If you set up an account using iCloud System Preferences or macOS Mail in 10.7.4 or later, you won't see these settings because they're automatically configured.
• Refer to your email client app's documentation for information about how to use these settings.

IMAP information for the incoming iCloud Mail server

• Server name: imap.mail.me.com
• SSL Required: Yes
• If you see an error message when using SSL, try using TLS instead.
• Port: 993
• Username: This is usually the name of your iCloud Mail email address (for example, johnappleseed, not johnappleseed@icloud.com). If your email client app can't connect to iCloud Mail using just the name of your email address, try using the full address.
• Password: Generate an app-specific password.

SMTP information for the outgoing iCloud Mail server

• Server name: smtp.mail.me.com
• SSL Required: Yes
• If you see an error message when using SSL, try using TLS or STARTTLS instead.
• Port: 587
• SMTP Authentication Required: Yes
• Username: Your full iCloud Mail email address (for example, johnappleseed@icloud.com, not johnappleseed)
• Password: Use the app-specific password that you generated when you set up the incoming mail server."

You can also view the mail settings here: Mail - Official Apple Support

If no resolution, please contact Apple Support here: Contact - Official Apple Support

Let us know if you have further questions.

Take care.

JSims, Thanks for letting us know. Since emails are still not syncing across your devices despite account settings being correct, we recommend that you contact Apple Support directly so that they can work with you to find a solution. You can reach them by clicking here: Apple Support or calling the most local number in your region: Contact Apple for support and service Thank you for participating in the Apple Support Communities. Cheers!