Dockermail is now modular
This commit is contained in:
Val
parent
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9
Makefile
9
Makefile
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all: build
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.PHONY: build
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build:
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docker build -t dockermail_made_special:2.11.1 .
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run:
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docker run --name dockermail -d -p 25:25 -p 587:587 -p 143:143 -v /opt/dockermail/settings:/mail_settings -v /opt/dockermail/vmail:/vmail dockermail_made_special:2.11.1
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79
README.md
79
README.md
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@ -1,72 +1,29 @@
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docker-made-special-mail
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Dockermail
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==========
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Based on https://github.com/lava/dockermail
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A secure, minimal-configuration mail server in a docker container.
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A secure, minimal-configuration mail server in a docker containers.
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This repository is tailored to small private servers, where you own a domain and want to host your own mail.
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This container uses postfix as MTA and dovecot as IMAP server.
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All incoming mail to your domains is accepted.
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For outgoing mail, only authenticated (logged in with username and password) clients can send messages via STARTTLS.
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The setup is modular and so far has (more to come, feel free to contribute :)
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SPAM stuff
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=====
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Outgoing mail is signed by OpenDKIM, you need to generate a key and set up your domain records (see step 5).
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You should add PTR record to your IP (aka reverse DNS) which is done by your server provider.
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* `email_core` - base SMTP and IMAP server
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* `opendkim` - adds DKIM signing service to the core
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Please see the README in each folder for more information on each image.
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### SPAM
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Although OpenDKIM is optional, I highly recommended you use it unless you want your mail to end up in someone's spam folder. See the README in `opendkim` folder for more info on setting it up.
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You should also add PTR record to your IP (aka Reverse DNS) which is done by your server provider.
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And finally, generate and add an SPF record to your domain, search for instructions on this - there are a few generator site around and the setup steps depend on your domain name provider.
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### Compose
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Assuming you follow the instructions in the accompanying READMEs to set up both containers, you should just be able to run
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Setup
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=====
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Create 2 folders: one for mail configuration (`/opt/dockermail/settings`), another for mail storage (`/opt/dockermail/vmail`).
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Use the the example config files in `config/example` of this repo.
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docker-compose up
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1. Add all domains you want to receive mail for to the file `/opt/dockermail/settings/domains`, like this:
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example.org
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example.net
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2. Add user aliases to the file `/opt/dockermail/settings/aliases`, like
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johndoe@example.org john.doe@example.org
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john.doe@example.org john.doe@example.org
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admin@forum.example.org forum-admin@example.org
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@example.net catch-all@example.net
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An IMAP mail account is created for each entry on the right hand side.
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Every mail sent to one of the addresses in the left column will be delivered to the corresponding account in the right column.
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3. Add user passwords to the file `/opt/dockermail/settings/passwords` like this
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john.doe@example.org:{PLAIN}password123
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admin@example.org:{SHA256-CRYPT}$5$ojXGqoxOAygN91er$VQD/8dDyCYOaLl2yLJlRFXgl.NSrB3seZGXBRMdZAr6
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To get the hash values, you can either install dovecot locally or use `docker exec -it dockermail bash` to attach to the running container (step 7) and run `doveadm pw -s <scheme-name>` inside.
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4. Change the hostname in file `/opt/dockermail/settings/myhostname` to the correct fully qualified domain of your server.
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5. Add DKIM settings files: `/opt/dockermail/settings/opendkim.conf` and `/opt/dockermail/settings/mail.private`
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See https://help.ubuntu.com/community/Postfix/DKIM on the info about these settings.
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You will need to generate your own `mail.private` key and set up your domain records, the `opendkim.conf` from `config/example`
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is ready to use.
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6. Build container
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make
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7. Run container and map ports 25 and 143 from the host to the container.
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To store your mail outside the container, map `/opt/dockermail/vmail/` to
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a directory on your host. (This is recommended, otherwise
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you have to remember to backup your mail when you want to restart the container)
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`docker run -name dockermail -d -p 25:25 -p 587:587 -p 143:143 -v /opt/dockermail/settings:/mail_settings -v /opt/dockermail/vmail:/vmail dockermail_made_special/2.11.1`
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8. Enjoy!
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and it will spin up both container and link them together, easy!
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TODO
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=====
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1. Split out DKIM into a seperate container, which can be linked in to postfix.
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2. Add ability to plug other components from linked containers (SPAM filters, Autoresponders etc)
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3. Provider an easy way to compose these into a working mail system.
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### Coming soon
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* Incoming SPAM filter!
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emailcore:
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build: ./email_core
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ports:
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- "25:25"
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- "143:143"
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- "587:587"
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volumes:
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- /opt/dockermail/settings:/mail_settings
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- /opt/dockermail/vmail:/vmail
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links:
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- opendkim
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opendkim:
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build: ./opendkim
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volumes:
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- /opt/dockermail/settings:/mail_settings
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@ -7,35 +7,37 @@ RUN locale-gen en_GB en_GB.UTF-8 && dpkg-reconfigure locales
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RUN apt-get update && apt-get install -y \
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ssl-cert \
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postfix \
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dovecot-imapd \
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dovecot-imapd && \
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apt-get clean && \
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rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
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# postfix configuration
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# Postfix configuration
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ADD ./config/postfix.main.cf /etc/postfix/main.cf
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ADD ./config/postfix.master.cf.append /etc/postfix/master-additional.cf
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RUN cat /etc/postfix/master-additional.cf >> /etc/postfix/master.cf
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# configure settings script
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VOLUME ["/mail_settings"]
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COPY boot /boot
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RUN chmod 755 /boot
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# add user vmail who own all mail folders
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VOLUME ["/vmail"]
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RUN groupadd -g 5000 vmail
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RUN useradd -g vmail -u 5000 vmail -d /vmail -m
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# dovecot configuration
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# Dovecot configuration
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ADD ./config/dovecot.mail /etc/dovecot/conf.d/10-mail.conf
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ADD ./config/dovecot.ssl /etc/dovecot/conf.d/10-ssl.conf
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ADD ./config/dovecot.auth /etc/dovecot/conf.d/10-auth.conf
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ADD ./config/dovecot.master /etc/dovecot/conf.d/10-master.conf
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ADD ./config/dovecot.lda /etc/dovecot/conf.d/15-lda.conf
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ADD ./config/dovecot.imap /etc/dovecot/conf.d/20-imap.conf
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# Uncomment to add verbose logging
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# ADD ./config/dovecot.logging /etc/dovecot/conf.d/10-logging.conf
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# Nice place for your settings
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VOLUME ["/mail_settings"]
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# Configure boot script
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COPY boot /
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RUN chmod 755 /boot
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# Volume to store email
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VOLUME ["/vmail"]
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# Add user vmail that ownes mail
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RUN groupadd -g 5000 vmail
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RUN useradd -g vmail -u 5000 vmail -d /vmail -m
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EXPOSE 25 143 587
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ENTRYPOINT /boot; service rsyslog start; service postfix start; dovecot -F
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Dockermail - Email Core
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==========
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This image provides a secure, minimal mail server based on 'postfix' and 'dovecot'.
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All incoming mail to your domains is accepted.
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For outgoing mail, only authenticated (logged in with username and password) clients can send messages via STARTTLS.
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### Setup
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You will need 2 folder on your host, one to store your configuration and another one to store your email.
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In the instructions below we will use the following:
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* `/opt/dockermail/settings` to store configuration
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* `/opt/dockermail/vmail` to store the mail
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Use the the example config files in `config/example` to get you started.
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1. Add all domains you want to receive mail for to the file `/opt/dockermail/settings/domains`, like this:
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example.org
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example.net
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2. Add user aliases to the file `/opt/dockermail/settings/aliases`:
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johndoe@example.org john.doe@example.org
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john.doe@example.org john.doe@example.org
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admin@forum.example.org forum-admin@example.org
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@example.net catch-all@example.net
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An IMAP mail account is created for each entry on the right hand side.
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Every mail sent to one of the addresses in the left column will be delivered to the corresponding account in the right column.
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3. Add user passwords to the file `/opt/dockermail/settings/passwords` like this
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john.doe@example.org:{PLAIN}password123
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admin@example.org:{SHA256-CRYPT}$5$ojXGqoxOAygN91er$VQD/8dDyCYOaLl2yLJlRFXgl.NSrB3seZGXBRMdZAr6
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To get the hash values, you can either install dovecot locally or use `docker exec -it [email_core_container_name] bash` to attach to the running container (step 6) and run `doveadm pw -s <scheme-name>` inside, remember to restart your container if you update the settings!
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4. Change the hostname in file `/opt/dockermail/settings/myhostname` to the correct fully qualified domain of your server.
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5. Build container
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docker build -t dockermail_email_core .
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6. Run container and map ports 25 and 143 from the host to the container.
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`docker run -name dockermail -d -p 25:25 -p 587:587 -p 143:143 -v /opt/dockermail/settings:/mail_settings -v /opt/dockermail/vmail:/vmail dockermail_email_core`
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# Check if we have SSL certificates in config, otherwise copy it there
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# First the key file
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if [ -f /mail_settings/ssl-cert-snakeoil.key ]; then
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cp /mail_settings/ssl-cert-snakeoil.key /etc/ssl/private/ssl-cert-snakeoil.key
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else
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cp /etc/ssl/private/ssl-cert-snakeoil.key /mail_settings/ssl-cert-snakeoil.key
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fi
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# Then the pem file
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if [ -f /mail_settings/ssl-cert-snakeoil.pem ]; then
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cp /mail_settings/ssl-cert-snakeoil.pem /etc/ssl/certs/ssl-cert-snakeoil.pem
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@ -12,32 +14,52 @@ else
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cp /etc/ssl/certs/ssl-cert-snakeoil.pem /mail_settings/ssl-cert-snakeoil.pem
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fi
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# Update hostname if given
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if [ -f /mail_settings/myhostname ]; then
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sed -i -e "s/myhostname = localhost/myhostname = $(sed 's:/:\\/:g' /mail_settings/myhostname)/" /etc/postfix/main.cf
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echo $(sed 's:/:\\/:g' /mail_settings/myhostname) > /etc/mailname
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fi
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# configure mail delivery to dovecot
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# Configure mail delivery to dovecot
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cp /mail_settings/aliases /etc/postfix/virtual
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cp /mail_settings/domains /etc/postfix/virtual-mailbox-domains
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# parse mailbox settings
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# Parse mailbox settings
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mkdir /etc/postfix/tmp
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awk < /etc/postfix/virtual '{ print $2 }' > /etc/postfix/tmp/virtual-receivers
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sed -r 's,(.+)@(.+),\2/\1/,' /etc/postfix/tmp/virtual-receivers > /etc/postfix/tmp/virtual-receiver-folders
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paste /etc/postfix/tmp/virtual-receivers /etc/postfix/tmp/virtual-receiver-folders > /etc/postfix/virtual-mailbox-maps
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# give postfix ownership of its files
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# Give postfix ownership of its files
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chown -R postfix:postfix /etc/postfix
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# map virtual aliases and user/filesystem mappings
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# Map virtual aliases and user/filesystem mappings
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postmap /etc/postfix/virtual
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postmap /etc/postfix/virtual-mailbox-maps
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chown -R postfix:postfix /etc/postfix
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# make user vmail own all mail folders
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# Make user vmail own all mail folders
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chown -R vmail:vmail /vmail
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chmod u+w /vmail
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# Add password file
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cp /mail_settings/passwords /etc/dovecot/passwd
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# OpenDKIM config
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POSTFIX_MAIN_CF=/etc/postfix/main.cf
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if [ -z "$OPEN_DKIM" ]; then
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# Add config block if not present already
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if grep -q "# OpenDKIM - dockermail" "$POSTFIX_MAIN_CF"; then
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echo "# OpenDKIM - dockermail" >> "$POSTFIX_MAIN_CF"
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echo "milter_default_action = accept" >> "$POSTFIX_MAIN_CF"
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echo "milter_protocol = 2" >> "$POSTFIX_MAIN_CF"
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echo "smtpd_milters = $OPEN_DKIM_PORT_8891_ADDR" >> "$POSTFIX_MAIN_CF"
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echo "non_smtpd_milters = $OPEN_DKIM_PORT_8891_ADDR" >> "$POSTFIX_MAIN_CF"
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echo "# OpenDKIM - dockermail - end" >> "$POSTFIX_MAIN_CF"
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fi
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else
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# Remove OpenDKIM block
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sed '/# OpenDKIM - dockermail/,/# OpenDKIM - dockermail - end/d' "$POSTFIX_MAIN_CF"
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fi
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@ -69,9 +69,3 @@ smtpd_tls_auth_only = yes
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smtpd_sasl_auth_enable = yes
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smtpd_sasl_type = dovecot
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smtpd_sasl_path = private/auth
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# DKIM
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milter_default_action = accept
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milter_protocol = 2
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smtpd_milters = inet:localhost:8891
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non_smtpd_milters = inet:localhost:8891
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@ -9,10 +9,15 @@ RUN apt-get update && apt-get install -y \
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apt-get clean && \
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rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
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# configure settings script
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# Nice place for your settings
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VOLUME ["/mail_settings"]
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COPY boot /boot
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# Configure boot script
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COPY boot /
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RUN chmod 755 /boot
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# start necessary services for operation (dovecot -F starts dovecot in the foreground to prevent container exit)
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ENTRYPOINT /boot; service rsyslog start; opendkim -f
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ENV OPEN_DKIM true
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ENV OPEN_DKIM_PORT_8891_ADDR inet:8891
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EXPOSE 8891
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ENTRYPOINT ./boot; service rsyslog start; opendkim -f -p $OPEN_DKIM_PORT_8891_ADDR
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@ -0,0 +1,18 @@
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Dockermail - OpenDKIM
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===
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Once configured and linked to the `email_core`, this image will provide DKIM singing for your mail.
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Please see http://www.opendkim.org/ for more information on OpenDKIM.
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### Configuration
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To get going you need to generate a key and set up your domain records (see step 5).
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This images uses settings files in an attached volume to configure the container on boot.
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You can place these in the same folder as the `email_core`'s settings for easy administration.
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* `opendkim.conf`
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You will find this file in the './config', change `Domain` to your own domain.
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* `mail.private`
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You will need to generate this private key file and use the public key in your domain's DNS setup.
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See https://help.ubuntu.com/community/Postfix/DKIM for info on generating keys and setting up your domain.
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# Copy OpenDKIM config
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cp /mail_settings/opendkim.conf /etc/opendkim.conf
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cp /mail_settings/mail.private /etc/dkim.key
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chown opendkim:opendkim /etc/dkim.key
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chown root:root /etc/dkim.key
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chmod 600 /etc/dkim.key
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@ -14,7 +14,7 @@ Syslog yes
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# Sign for example.com with key in /etc/mail/dkim.key using
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# selector '2007' (e.g. 2007._domainkey.example.com)
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Domain example.com
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KeyFile /etc/dkim.key # See bellow how to generate and set up the key
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KeyFile /etc/dkim.key
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Selector mail
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# Common settings. See dkim-filter.conf(5) for more information.
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