gmail not sending to custom domain

Hello otterdog33,

You've done a great job isolating the issue with your customer email domains. To confirm, have you noticed this issue with all Gmail accounts or one specific account? Also, have you checked to see if the emails being sent to the first domain from the Gmail account is being sent to the Spam or Junk email folders? If not, check those folders to help isolate the issue further. You may also find the steps listed below helpful in reaching a resolution.

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 continue to have issues after completing these steps, you'll want to complete the remaining steps outlined in the following article. These steps are specific to resolving iCloud Mail issues.

If iCloud Mail isn't working

Take care!

Hey there, otterdog33,

Glad to read this has been resolved.

Please don't hesitate to reach out if you need assistance in the future with your Apple devices or services.

Regards.