We gotta give Mailgun some empathy here. It's tough to run an email service and keep reputation of it. If some bad actor got in, they can send large spam email and dilute the reputation.<p>Of course, this is just a mistake and after explaining Mailgun shouldn't charge $1358 for clean service. But as a customer, you should take some responsibility when doing something wrong as well. For example, if the account is old, and this is the first time this happen, and once we explain the mistake, Mailgun should waive that fee.<p>On AWS SES if the bounce rate >10%, your account is temporarily suspended.<p>If the exact samething happen with any mail provider, where a large of emails volume are bounced. They would need to pause/restrict your account in some way.<p>I would suggest look into AWS SES and started to write code to handle bounce email yourself to get a sense of it.