Disable the Push IMAP (IDLE) email in macOS Sierra

I'm wondering if anybody has found a workaround to the question of how can you disable the Push IMAP (IDLE) email in Macmail for OSX High Sierra?

My WP website crashed because IMAP in Macmail runs too many processes and eats up my usable server space.

I have a short term workaround by turning off MacMail on my computer and turning off ALL my devices at the same time. That will clean up my usage for about 24 hours before I go back into the red zone of disc usage.

Before OSX Sierra, you could just disable the Push IMAP setting. That isn't available anymore.

Any thoughts?

Glenn