What is it
It is a simple Dovecot IMAP server Docker image with one predefined account for archiving your mail on a locally available NFS share.
This docker image is running perfect since Jan 2015 on my QNAP NAS :) Feedback e.g. on the alternative Synology DSM environment is very welcome.
My personal motivation to create this Docker image
- I need to archive mail on a local IMAP Server at home
- there is a present NFS server (NAS server with NFS)
- home use requires limited IT security
- solution must allow to migrate easily to new technologies over many years
- as simple as possible :)
How to use
Here I create a NFS share with the name mailarchive. Allow your Docker host IP address to access it.
Start the docker container:
docker run --rm --privileged -e NFS_REMOTETARGET=192.168.10.10:/mailarchive \ -p 143:143 muenchhausen/ubuntu-dovecot-simple-imap:latest -F
Start it as Daemon and keep it running:
docker run -d --restart=always --privileged -e NFS_REMOTETARGET=192.168.10.10:/mailarchive \ -p 143:143 muenchhausen/ubuntu-dovecot-simple-imap:latest -F
Create an imap mail account with username mailarchive and password mailarchive and plain text authentication. Done.
To stop dovecot by Ctrl-C does not work here. I usally stop it by running
docker ps -all docker stop <id>
Because I use the --rm docker option, the container will be removed after stopping, which is fine for this use case. Just try also other dovecot options than -F. E.g. option -n will show the actual config.
Adapt and Build it
You can optimize the IT Security settings if required. Pull it from GitHub. Edit the dockerfile and try to build it on your own :)
docker build -t muenchhausen/ubuntu-dovecot-simple-imap .
The preferred way is the Unix Way: Small reusable images with clear responsibilities. One image for Dovecot, one image for the NFS Client - e.g. cpuguy83's nfs-client: Somewhen this can be used to map NFS shares to volumes which can be accessed by any other Docker containers as required. This is not possible today - see issue. So let's wait.