When going over the limit on Elastic Email service you need to notify before cancelling
Hi, my account went above my elastic email credits but we were not notified and the system just stopped sending email to my customers. We noticed after two days that something was wrong. This is unacceptable. You need to give warning to your customers of impending catastrophic problems, otherwise we lose business. So we were really disappointed that something so simple to do and expected was implemented.
Capucine Roussel commented
I have had this issue as well and am very disappointed that my emails were blocked without any warning.