The default email client on Mac is named as ‘Mail app’ and the application is pretty cool with good features. However, some people are so addicted to the email clients they have been using over the years that they simply do not feel okay about changing it to something else. If you want to change a default app other than your browser or email client then you can still do so. Open up Finder, navigate to the file in question and right-click it to bring up the contextual. What if I want to set web-based email like Google Mail as my default mail app? Use the above steps and set Google Chrome as your default email reader. Use Google Chrome as your browser and login to your Gmail account. Select the handler icon located on the right side of the Chrome address bar and choose “Allow“.
Here, you can learn about Fantastical, BusyCal, Apple Calendar integrations for Airmail.
Make Fantastical your default calendar app by going to Apple Calendar Preferences > General > Default calendar app > Fantastical 2.

Simply double click the '.ics' file received in the preview of email with the calendar invite and the invite will automatically create an event in the Apple Calendar app.Published on: 01 / 13 / 2019
Add as many email accounts of any type your like to Airmail. (Gmail, GSuite, iCloud Mail, Exchange, Office 365, Microsoft Outlook, IMAP and POP3).
When you just want to see the important emails, the smart inbox is here for you. It automatically filters out newsletters and other distractions, leaving you with just the crucial messages.
When you don't want to deal with an email now, but don't want it in your inbox either, use the snooze function to hide it until it's relevant. From concert tickets to flight confirmations, keep the emails out of the way until you need them.
See all of the email in all of your inboxes at once with the unified inbox feature. You can even exclude accounts from this view if you want to.
If privacy is paramount then you can enable privacy mode which will process all the data locally on your device. Privacy mode also blocks tracking pixels, and prevents images from loading automatically.
Schedule emails for the perfect moment. Schedule your emails to land in the recipient’s inbox at just the right time. Whether it’s a client in Australia or a business partner in Europe, your email will always be on top.