smtp_deployment

Kubernetes deployment for simple SMTP server for sending Emails.

This is based on the top of work done by https://github.com/BytemarkHosting/docker-smtp

SMTP deployment can be orchestrated using Kubernetes.

The default yaml files exposes SMTP server as NodePort service on 30050 port.

Deploy

To deploy, clone and CD into this repo

kubectl apply -f k8manifests

Environment variables

Environment defaults to

environment: RELAY_HOST: smtp.example.com\n RELAY_PORT: 587\n RELAY_USERNAME: alice@example.com\n RELAY_PASSWORD: secretpassword\n

All environment variables are optional. But if you specify a RELAY_HOST, then you'll want to also specify the port, username and password otherwise it's unlikely to work!

• MAILNAME: Sets Exim's primary_hostname, which defaults to the hostname of the server.
• RELAY_HOST: The remote SMTP server address to use.
• RELAY_PORT: The remote SMTP server port to use.
• RELAY_USERNAME: The username to authenticate with the remote SMTP server.
• RELAY_PASSWORD: The password to authenticate with the remote SMTP server.
• RELAY_NETS: Declare which networks can use the smart host, separated by semi-colons. By default, this is set to 10.0.0.0/8;172.16.0.0/12;192.168.0.0/16, which provides a thin layer of protection in case port 25 is accidentally exposed to the public internet (which would make your SMTP container an open relay).