Hello @SherrieL5 ,
Is this occurring on a desktop version of the app, or on an iPhone / iPad? Are you able to safelist the following domains in your network?
If this is occurring in a desktop version of Mac Mail, update the setting in the Mail program to show images/download attachments via this path:
Mail > Mailbox > Preferences > Accounts > [Google or other email provider] IMAP > Account Information > Download Attachments > select “ALL”
If this is occurring on an app version of Mac Mail:
Another potential workaround is to click on the image block in the editor as if you were going to change it:
If none of the above workarounds and troubleshooting steps alleviate your issue, I'd advise calling our general support line so they can perform further live troubleshooting, and also work with our higher level technical team.