• Log in to https://webmail.<yourdomain>
• On the left side click "Website Home"
• Scroll down to "Other Webmail Features"
• Click on "Configure Mail Client"
• For Apple macOS
  • To the right of "iOS for iPhone/iPad/iPod and MacOS® Mail.app"
  • Click on "IMAP over SSL/TLS"
  • Click on "Proceed"
• Find & Open the downloaded file.
• Go to "System Settings"
  • Click on "Privacy & Security"
    • Scroll down to "Others" and click on "Profiles"
    • Under "Downloaded" double-click on the profile and click "Install"
    • Enter your email "Password" and click on "Install"
  • Click on "Internet Accounts"
    • Click on the Email Account"
    • If "Notes" is turned on then turn it off and click on "Delete from My Mac"