I received a comment from a client the other day asking why incoming emails were taking so long?

We ran a couple of tests and seems when an email from outside is received, it sits in the spool folder for minimum 30 seconds sometime up to 50 seconds, even if the email/domain is trusted.

This is a bit frustrating for those users who receive 2fa codes, feels like a lifetime waiting for them.

Any ideas to speed delivery up?