Airmail is an email app that manages multiple email accounts under a single platform. It is best compatible with macOS and iOS devices. Sometimes, Airmail will not work if there is a problem with the email settings or app update. In most cases, Airmail users experience issues due to Internet connection issues. In case the Airmail app not working on Mac, you can use two factors: Activity and Operations. These factors are included in Airmail to check the connection issue. If the issue is not with the Internet, follow these troubleshooting steps.