Can I be notified when there is a new system message?

We offer a notification service in the app. It will send many of the notices you see in Maintenance logs, especially those that the sync can't recover from itself without user input, like sync failures or apex errrors..

Open the Mailchimp Settings tab and then the Maintenance page. Click the drop down in the upper right and then the cog icon. This will open Maintenance Settings, where you can set an email address to receive system notifications.

Note: You may also want to ensure you are received standard Salesforce Apex Exception Emails and Flow and Process Error Recipients, as any errors from your custom automation (flows, code) may go there instead.