How do I stop emails 'pushing' to Apple Mail (macOS Sierra) I don't want Mail to automatically download new mail. I want to manually do this by choosing Mailbox > Get All New Mail.

I have tried setting the preference 'Check for new messages: Manually' in Preferences > General, thinking this would solve the issue. But email still pushes to my iCloud account!

Does anyone know how to change this behaviour so new mail only delivers when I ask the app to fetch it?

Thanks!

Andy
According to this topic:
Disable the Push IMAP (IDLE) email in macOS Sierra, Apple has removed that option.