SMTP server, Grafana and Prometheus. Sending email from Grafana server

Asking for help? Comment out what you need so we can get more information to help you!

I deployed Prometheus and Grafana in our Kubernetes cluster. On the Grafana server web page, I clicked on the “Send Test” from Alerting Notification channels. But, I do not receive any email from Grafana server. I think I need to deploy SMTP server into Kubernetes cluster, configure the SMTP and Grafana servers to enable Grafana sends out email. Are there any instructions or links that tell how to deploy a proper SMTP server, and configure Grafana inside Kubernetes cluster to make Grafana sends out email?

Cluster information:

Kubernetes version: 1.14
Cloud being used: (put bare-metal if not on a public cloud) AWS
Installation method: EKS
Host OS: Linux
CNI and version: amazon-k8s-cni:v1.5.5
CRI and version:

You can format your yaml by highlighting it and pressing Ctrl-Shift-C, it will make your output easier to read.