We have an #Announcements category in which all our members are automatically subscribed to watch the first post.
This allows us to schedule the publishing of posts in to that category on set times/dates.
In turn, the announcement is then emailed to around 25k members.
The problem we face is that the emails take over an hour to get sent, not idea for time-critical announcements.
If I watch Sidekiq I can see the “Scheduled” counter racking up all the individual emails one by one, once it gets to around 20,000 it then moves them over to the “Enqueued” tab, and then they eventually start sending out.
Am I able to speed this process up at all? 
For time critical emails it’d be nice to send them out around 100x faster than they currently go 