EXIM4 Helm

A Helm chart to provide a exim4 deployment, exim4 (MTA) running as a smarthost.

The MTA is based on Exim4. The Image was inspired by the Docker Image from imixs/exim4. The Docker image is based on debian:jessie.

Prerequisites

• Kubernetes 1.16+
• Helm 3.7+

Get Repository Info

helm repo add exim4 https://mb-wali.github.io/exim4-helm
helm repo update

Install Chart

helm install [RELEASE_NAME] exim4/exim4 --namespace [NAMESPACE] --create-namespace --wait

# Install with --set values
helm install exim4 --set secrets.EXIM_SMARTHOST='localhost',secrets.EXIM_PASSWORD='passw0rd',secrets.EXIM_ALLOWED_SENDERS='*' exim4/exim4 --namespace mail --create-namespace --wait

Environment

exim4 provides the following environment variables

• EXIM_SMARTHOST - your target mail server
• EXIM_PASSWORD - authenticating to a remote host as a client.
• EXIM_ALLOWED_SENDERS - allowed sender IP/Network addresses (default=172.17.0.0/24:127.0.0.1)
• EXIM_MESSAGE_SIZE_LIMIT - overwrites the default message_size_limit of 50m (default=255M)

Debugging

Once the pod is running

# execute shell 
kubectl exec -it exim4-6ff546fb9f-ff47m -- bash

# send a test mail
echo "This is test" | mail -s "The subject" reciever@myhost.com -aFrom:sender@myhost.com

Usage

Use your deployed exim4 to send mails, e.g. connect from a another service.

SMTP_HOST=exim4.mail.svc.cluster.local

helm install [local]

helm install exim4 Charts/exim4/ --namespace mail --create-namespace --wait --dry-run