Troubleshooting/FAQ SMTP Settings
Question: I am sending stuff out via AuthSMTP.com, do I still have to set my e-mail limit to something small or can I go big e.g. 15000 per hour?
You can go big.. DAP does not have any restriction.
But the cron might end up running for a long time and your host (especially if you are on shared hosting) might have a problem with that. Also make sure the hourly cron does not kick off if it finds that the old cron has not finished running yet. Usually webhosts have a feature where they lock the cron from running if the previous run of same cron has not completed.. but you might want to confirm with your host.