Emails – Inmail + Mail Handler does not create content

I'm trying to use inmail and mail handlers to automatically create content by sending an email to an email address.

I was able to set up an IMAP deliverer and can confirm that he receives the emails properly.

However, nothing happens after I click on the Polling Processing button in the supplier's administrator UI (/ admin / config / system / inmail / deliverers).

Has anyone been able to successfully set this up?