How to speed up event confirmation email? I recently setup a Drupal 8 instance to set up a special event website. I am allowing users to build inline contacts to register for an RNG event. Everything seems to be working: The users offer their email and username, and the contact is created; then, they register for the event and the registration is created. Twelve hours later, they get an email message setup using the Courier and Rules integration with RNG.

Is there a way to speed up the confirmation email?  If I send an email from a user contact form on the same website, it sends it immediately. I imagine it is a Courier/Rules issue with how often the email queue is being processed, but I cannot figure out where that is configured.
Courier message dispatch is all done in cron. Therefore, in order to speed up the delivery of messages, you should run cron as often as possible.

Personally I run it every 30 seconds, but every 1-5 minutes should be fine in most cases.

Disclaimer: I am the maintainer of both the RNG and the Courier modules.