hey peterkos, great question! We ensure reliable delivery times through a variety of strategies:

1. We strive to maintain a good email domain reputation which is a huge factor for email deliverability and speed

2. We pick our email service provider carefully. Current we use Postmark which carters towards transactional emails and has the fastest delivery time to all inboxes.

3. We have redundancy mechanisms in place that allows us to switch between email providers (SendGrid and MailGun) on demand.

Hope that answers your question!