Imap bounce speed problems

Your software
My Mautic version is: 2.16
My PHP version is: 7.2

Your problem
My problem is: I set the IMAP configuration with my bounce email and it works, all right. The problem is that we sent a campaign that obtained 10.000 bounce emails. And when we run the cron job of monitored email (mautic:emails:fetch), is extremly slow, at a rete of 1 processed email by 1 minute.

So, that do not works, I think we have some wrong configuration or something.

Any idea?

We have the same problem. our Mautic is processing 2 emails a minute!
There should be a place to change it to process faster.

Please someone help us!