aguslr/postfix repository overview

⁠aguslr/docker-postfix⁠

This Docker image sets up Postfix inside a docker container.

⁠Installation

To use docker-postfix, follow these steps:

1. Clone and start the container:

   docker run -p 25:25 \
     -e POSTFIX_HOSTNAME=mail.example.com \
     -e POSTFIX_RELAYSERVER=smtp.mail.com \
     -e [email protected] \
     -e POSTFIX_RELAYPASS=123456 \
     docker.io/aguslr/postfix:latest
   

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2. Configure your systems to send email to your Postfix server's IP address on port 25.

⁠Variables

The image is configured using environment variables passed at runtime. All these variables are prefixed by POSTFIX_.

⁠Password file

As an alternative to passing the relay's server password at runtime, we can use a password file (e.g. passwd) with the format:

[RELAYSERVER]:RELAYPORT RELAYUSER:RELAYPASS

We can then mount this file at runtime with this command:

docker run -p 25:25 \
  -e POSTFIX_HOSTNAME=mail.example.com \
  -e POSTFIX_RELAYSERVER=smtp.mail.com \
  -e [email protected] \
  -v "${PWD}"/passwd:/etc/postfix/sasl_passwd \
  docker.io/aguslr/postfix:latest

⁠Build locally

Instead of pulling the image from a remote repository, you can build it locally:

1. Clone the repository:

   git clone https://github.com/aguslr/docker-postfix.git
   

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2. Change into the newly created directory and use docker-compose to build and launch the container:

   cd docker-postfix && docker-compose up --build -d
   

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