postfix

Simple Postfix SMTP TLS relay docker image with no local authentication enabled (to be run in a secure LAN).

Build instructions

Clone this repo and then:

cd postfix
sudo docker build -t postfix .

How to run it

The following env variables need to be passed to the container:

• SMTP_SERVER Server address of the SMTP server to use.
• SMTP_USERNAME Username to authenticate with.
• SMTP_PASSWORD Password of the SMTP user.
• SMTP_HOSTNAME Server hostname for the Postfix container. Emails will appear to come from the hostname's domain.

To use this container from anywhere, the 25 port needs to be exposed to the docker host server:

docker run -d --name postfix -p "25:25"  \ 
       -e SMTP_SERVER=smtp.bar.com \
       -e SMTP_USERNAME=foo@bar.com \
       -e SMTP_PASSWORD=XXXXXXXX \
       -e SMTP_HOSTNAME=helpdesk.mycompany.com \
       hasgeek/postfix

If you are going to use this container from other docker containers then it's better to just publish the port:

docker run -d --name postfix -P \
       -e SMTP_SERVER=smtp.bar.com \
       -e SMTP_USERNAME=foo@bar.com \
       -e SMTP_PASSWORD=XXXXXXXX \
       -e SMTP_HOSTNAME=helpdesk.mycompany.com \
       hasgeek/postfix