Mounting volumes does not change container files

[Sigurthorb]

I am playing around with the postfix folder and trying to change sasl/smtpd.conf file but the files in the container are not loaded to the /etc/postfix folder.

In the readme.md there is noted that all folders (expect letsencrypt) need to be mounted to the tmp folder.

files must be mounted to /tmp in your container

To make changes I need to rebuild the image with the changed code in the git project folder

my docker-compose file:

mail:
  restart: always
  #image: tvial/docker-mailserver
  build: ./docker-mailserver
  hostname: mail
  domainname: host.com
  ports:
  - "25:25"
  - "143:143"
  - "587:587"
  - "993:993"
  volumes:
  - ./spamassassin:/tmp/spamassassin/
  - ./postfix:/tmp/postfix/
  - /etc/letsencrypt:/etc/letsencrypt
  environment:
  - DMS_SSL=letsencrypt

[tomav]

You don't need to rebuild, but restart the container.
Some files are generated at startup.
You should have a look to https://github.com/tomav/docker-mailserver/blob/master/start-mailserver.sh to understand how it works.

I use git to pull new configuration and then I docker-compose up -d mail to restart it using the new config.

[Sigurthorb]

Ahh I see. I thought the start-mailserver.sh was a part of the image it self. I'll have a look at it.
Thank you

[tomav]

Let me know if I can help.