How does ActionMailer::DeliveryJob run more frequently

Added by Alexander Kolosov about 1 year ago

I have migrated our Rermine from 3.x.x to 4.0.7. Now ActionMailer::DeliveryJob sends emails but it runs once at half an hour. My users are used to receiving notification emails immediately after creating a message in the Redmine.
Is it possible either to disable async mode of mail sending or to configure ActionMailer::DeliveryJob runs more frequently?