391 lines
13 KiB
Markdown
391 lines
13 KiB
Markdown
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# Anonymize headers for smtp relayed
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Save as `data/conf/postfix/mailcow_anonymize_headers.pcre`:
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```
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/^\s*Received:[^\)]+\)\s+\(Authenticated sender:(.+)/
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REPLACE Received: from localhost (localhost [127.0.0.1]) (Authenticated sender:$1
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/^\s*User-Agent/ IGNORE
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/^\s*X-Enigmail/ IGNORE
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/^\s*X-Mailer/ IGNORE
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/^\s*X-Originating-IP/ IGNORE
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/^\s*X-Forward/ IGNORE
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/^\s*Mime-Version:/ IGNORE
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```
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Add this to `data/conf/postfix/main.cf`:
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```
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smtp_header_checks = pcre:/opt/postfix/conf/mailcow_anonymize_headers.pcre
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```
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# Backup and restore maildir (simple tar file)
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### **Backup**
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This line backups the vmail directory to a file backup_vmail.tar.gz in the mailcow root directory:
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```
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cd /path/to/mailcow-dockerized
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source mailcow.conf
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DATE=$(date +"%Y%m%d_%H%M%S")
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docker run --rm -it -v $(docker inspect --format '{{ range .Mounts }}{{ if eq .Destination "/var/vmail" }}{{ .Name }}{{ end }}{{ end }}' $(docker-compose ps -q dovecot-mailcow)):/vmail -v ${PWD}:/backup debian:jessie tar cvfz /backup/backup_vmail.tar.gz /vmail
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```
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You can change the path by adjusting ${PWD} (which equals to the current directory) to any path you have write-access to.
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Set the filename `backup_vmail.tar.gz` to any custom name, but leave the path as it is. Example: `[...] tar cvfz /backup/my_own_filename_.tar.gz`
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### **Restore**
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```
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cd /path/to/mailcow-dockerized
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source mailcow.conf
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DATE=$(date +"%Y%m%d_%H%M%S")
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docker run --rm -it -v $(docker inspect --format '{{ range .Mounts }}{{ if eq .Destination "/var/vmail" }}{{ .Name }}{{ end }}{{ end }}' $(docker-compose ps -q dovecot-mailcow)):/vmail -v ${PWD}:/backup debian:jessie tar xvfz /backup/backup_vmail.tar.gz
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```
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For the tab-tab... :-)
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```
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curl -L https://raw.githubusercontent.com/docker/compose/$(docker-compose version --short)/contrib/completion/bash/docker-compose -o /etc/bash_completion.d/docker-compose
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```
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# Black- and Whitelist
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Edit a domain as (domain) administrator to add an item to the filter table.
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Beware that a mailbox user can login to mailcow and override a domain policy filter item.
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# Change default theme
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mailcow uses [Bootstrap](http://getbootstrap.com/), a HTML, CSS, and JS framework.
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Open or create the file `data/web/inc/vars.local.inc.php` and change `DEFAULT_THEME` to either cerulean, cosmo, custom, cyborg, darkly, flatly, journal, paper, readable, sandstone, simplex, slate, spacelab, superhero, united or yeti (see https://bootswatch.com/):
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```
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<?php
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$DEFAULT_THEME = "paper";
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```
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# Customize Dockerfiles
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Make your changes in `data/Dockerfiles/$service` and build the image locally:
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```
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docker build data/Dockerfiles/service -t andryyy/mailcow-dockerized:$service
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```
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Now auto-recreate modified containers:
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```
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docker-compose up -d
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```
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# Do not check sender addresses for any domain
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This option is not best-practice and should only be implemented when there is no other option available to archive whatever you are trying to do.
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Simply create a file `data/conf/postfix/check_sender_access` and enter the following content:
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```
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user-to-allow-everything@example.com OK
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```
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Open `data/conf/postfix/main.cf` and find `smtpd_sender_restrictions`. Prepend `check_sasl_access hash:/opt/postfix/conf/check_sender_access` like this:
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```
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smtpd_sender_restrictions = check_sasl_access hash:/opt/postfix/conf/check_sender_access reject_authenticated_sender [...]
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```
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Run postmap on check_sasl_access:
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```
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docker-compose exec postfix-mailcow postmap /opt/postfix/conf/check_sasl_access
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```
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Restart the Postfix container.
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# Install Roundcube
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Download Roundcube 1.3.x (beta at the time of Feb 2017) to the web htdocs directory and extract it (here `rc/`):
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```
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cd data/web/rc
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wget -O - https://github.com/roundcube/roundcubemail/releases/download/1.3-beta/roundcubemail-1.3-beta-complete.tar.gz | tar xfvz -
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# Change folder name
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mv roundcubemail-1.3* rc
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# Change permissions
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chown -R root: rc/
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```
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Create a file `data/web/rc/config/config.inc.php` with the following content.
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**Change the `des_key` parameter to a random value.** It is used to temporarily store your IMAP password.
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```
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<?php
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error_reporting(0);
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if (!file_exists('/tmp/mime.types')) {
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file_put_contents("/tmp/mime.types", fopen("http://svn.apache.org/repos/asf/httpd/httpd/trunk/docs/conf/mime.types", 'r'));
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}
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$config = array();
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$config['db_dsnw'] = 'mysql://' . getenv('DBUSER') . ':' . getenv('DBPASS') . '@mysql/' . getenv('DBNAME');
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$config['default_host'] = 'tls://dovecot';
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$config['default_port'] = '143';
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$config['smtp_server'] = 'tls://postfix';
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$config['smtp_port'] = 587;
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$config['smtp_user'] = '%u';
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$config['smtp_pass'] = '%p';
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$config['support_url'] = '';
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$config['product_name'] = 'Roundcube Webmail';
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$config['des_key'] = 'rcmail-!24ByteDESkey*Str';
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$config['log_dir'] = '/dev/null';
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$config['temp_dir'] = '/tmp';
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$config['plugins'] = array(
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'archive',
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);
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$config['skin'] = 'larry';
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$config['mime_types'] = '/tmp/mime.types';
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$config['imap_conn_options'] = array(
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'ssl' => array('verify_peer' => false, 'verify_peer_name' => false, 'allow_self_signed' => true)
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);
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$config['enable_installer'] = false;
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$config['smtp_conn_options'] = array(
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'ssl' => array('verify_peer' => false, 'verify_peer_name' => false, 'allow_self_signed' => true)
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);
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```
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Point your browser to `https://myserver/rc/installer` and follow the instructions.
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Initialize the database and leave the installer.
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**Delete the directory `data/web/rc/installer` after a successful installation!**
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## Enable password changing
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Open `data/web/rc/config.inc.php` and enable the password plugin:
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```
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...
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$config['plugins'] = array(
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'archive',
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'password',
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);
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...
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```
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Open `data/web/rc/plugins/password/password.php`, search for `case 'ssha':` and add above:
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```
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case 'ssha256':
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$salt = rcube_utils::random_bytes(8);
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$crypted = base64_encode( hash('sha256', $password . $salt, TRUE ) . $salt );
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$prefix = '{SSHA256}';
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break;
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```
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Open `data/web/rc/plugins/password/config.inc.php` and change the following parameters (or add them at the bottom of that file):
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```
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$config['password_driver'] = 'sql';
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$config['password_algorithm'] = 'ssha256';
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$config['password_algorithm_prefix'] = '{SSHA256}';
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$config['password_query'] = "UPDATE mailbox SET password = %P WHERE username = %u";
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```
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# Learn spam and ham
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Rspamd learns mail as spam or ham when you move a message in or out of the junk folder to any mailbox besides trash.
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This is archived by using the Dovecot plugin "antispam" and a simple parser script.
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Rspamd also auto-learns mail when a high or low score is detected (see https://rspamd.com/doc/configuration/statistic.html#autolearning)
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The bayes statistics are written to Redis as keys `BAYES_HAM` and `BAYES_SPAM`.
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You can also use Rspamds web ui to learn ham and/or spam.
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# MySQL
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### Connect to the MySQL database:
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```
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source mailcow.conf
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docker-compose exec mysql-mailcow mysql -u${DBUSER} -p${DBPASS} ${DBNAME}
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```
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### Backup the database:
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```
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cd /path/to/mailcow-dockerized
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source mailcow.conf
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DATE=$(date +"%Y%m%d_%H%M%S")
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docker-compose exec mysql-mailcow mysqldump --default-character-set=utf8mb4 -u${DBUSER} -p${DBPASS} ${DBNAME} > backup_${DBNAME}_${DATE}.sql
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```
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### Restore the database:
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```
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cd /path/to/mailcow-dockerized
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source mailcow.conf
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docker-compose exec mysql-mailcow mysql -u${DBUSER} -p${DBPASS} ${DBNAME} < backup_file.sql
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```
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# Read logs
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You can use `docker-compose logs $service-name` for all containers.
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Run `docker-compose logs` for all logs at once.
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Follow the log output by running docker-compose with `logs -f`.
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# Redirect port 80 to 443
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Since February the 28th 2017 mailcow does come with port 80 and 443 enabled.
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Open `mailcow.conf` and set `HTTP_BIND=0.0.0.0`.
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Open `data/conf/nginx/site.conf` and add a new "catch-all" site at the top of that file:
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```
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server {
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listen 80 default_server;
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server_name _;
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return 301 https://$host$request_uri;
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}
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```
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Restart the stack, changed containers will be updated:
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`docker-compose up -d`
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# Redis
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## Connect to redis key store:
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```
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docker-compose exec redis-mailcow redis-cli
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```
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# Remove persistent data
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- Remove volume `mysql-vol-1` to remove all MySQL data.
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- Remove volume `redis-vol-1` to remove all Redis data.
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- Remove volume `vmail-vol-1` to remove all contents of `/var/vmail` mounted to `dovecot-mailcow`.
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- Remove volume `dkim-vol-1` to remove all DKIM keys.
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- Remove volume `rspamd-vol-1` to remove all Rspamd data.
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Running `docker-compose down -v` will **destroy all mailcow: dockerized volumes** and delete any related containers.Reset mailcow admin to `admin:moohoo`:
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1. Drop admin table
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```
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source mailcow.conf
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docker-compose exec mysql-mailcow mysql -u${DBUSER} -p${DBPASS} ${DBNAME} -e "DROP TABLE admin;"
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```
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2. Open mailcow UI to auto-init the db
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# Rspamd
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## Rspamd CLI tools
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```
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docker-compose exec rspamd-mailcow rspamc --help
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docker-compose exec rspamd-mailcow rspamadm --help
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```
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See [Rspamd documentation](https://rspamd.com/doc/index.html)
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# Adjust service configurations
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The most important configuration files are mounted from the host into the related containers:
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```
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data/conf
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├── bind9
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│ └── named.conf
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├── dovecot
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│ ├── dovecot.conf
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│ ├── dovecot-master.passwd
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│ ├── sieve_after
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│ └── sql
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│ ├── dovecot-dict-sql.conf
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│ └── dovecot-mysql.conf
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├── mysql
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│ └── my.cnf
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├── nginx
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│ ├── dynmaps.conf
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│ ├── site.conf
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│ └── templates
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│ ├── listen_plain.template
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│ ├── listen_ssl.template
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│ └── server_name.template
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├── pdns
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│ ├── pdns_custom.lua
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│ └── recursor.conf
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├── postfix
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│ ├── main.cf
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│ ├── master.cf
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│ ├── postscreen_access.cidr
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│ ├── smtp_dsn_filter
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│ └── sql
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│ ├── mysql_relay_recipient_maps.cf
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│ ├── mysql_tls_enforce_in_policy.cf
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│ ├── mysql_tls_enforce_out_policy.cf
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│ ├── mysql_virtual_alias_domain_catchall_maps.cf
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│ ├── mysql_virtual_alias_domain_maps.cf
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│ ├── mysql_virtual_alias_maps.cf
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│ ├── mysql_virtual_domains_maps.cf
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│ ├── mysql_virtual_mailbox_maps.cf
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│ ├── mysql_virtual_relay_domain_maps.cf
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│ ├── mysql_virtual_sender_acl.cf
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│ └── mysql_virtual_spamalias_maps.cf
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├── rmilter
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│ └── rmilter.conf
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├── rspamd
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│ ├── dynmaps
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│ │ ├── authoritative.php
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│ │ ├── settings.php
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│ │ ├── tags.php
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│ │ └── vars.inc.php -> ../../../web/inc/vars.inc.php
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│ ├── local.d
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│ │ ├── dkim.conf
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│ │ ├── metrics.conf
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│ │ ├── options.inc
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│ │ ├── redis.conf
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│ │ ├── rspamd.conf.local
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│ │ └── statistic.conf
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│ ├── lua
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│ │ └── rspamd.local.lua
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│ └── override.d
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│ ├── logging.inc
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│ ├── worker-controller.inc
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│ └── worker-normal.inc
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└── sogo
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|
|
├── sieve.creds
|
||
|
|
└── sogo.conf
|
||
|
|
|
||
|
|
```
|
||
|
|
Just change the according configuration file on the host and restart the related service: `docker-compose restart service-mailcow`
|
||
|
|
# Tagging
|
||
|
|
|
||
|
|
Mailbox users can tag their mail address like in `me+facebook@example.org` and choose between to setups to handle this tag:
|
||
|
|
|
||
|
|
1. Move this message to a subfolder "facebook" (will be created lower case if not existing)
|
||
|
|
2. Prepend the tag to the subject: "[facebook] Subject"
|
||
|
|
# Two-factor authentication
|
||
|
|
|
||
|
|
So far two methods for TFA are impelemented. Both work with the fantastic [Yubikey](https://www.yubico.com).
|
||
|
|
|
||
|
|
While Yubi OTP needs an active internet connection and an API ID/key, U2F will work with any FIDO U2F USB key out of the box.
|
||
|
|
|
||
|
|
Both methods support mulitple YubiKeys.
|
||
|
|
|
||
|
|
As administrator you are able to temporary disable a domain adminsitrators TFA login until they successfully logged in.
|
||
|
|
|
||
|
|
The key used to login will be displayed in green, while other keys remain grey.
|
||
|
|
|
||
|
|
## Yubi OTP
|
||
|
|
|
||
|
|
The Yubi API ID and Key will be checked against the Yubico Cloud API. When setting up TFA you will be asked for your personal API account for this key.
|
||
|
|
The API ID, API key and the first 12 characters (your YubiKeys ID in modhex) are stored in the MySQL table as secret.
|
||
|
|
|
||
|
|
## U2F
|
||
|
|
|
||
|
|
Only Google Chrome (+derivates) and Opera support U2F authentication to this day natively.
|
||
|
|
For Firefox you will need to install the "U2F Support Add-on" as provided on [mozilla.org](https://addons.mozilla.org/en-US/firefox/addon/u2f-support-add-on/).
|
||
|
|
U2F works without an internet connection.# Why does mailcow come with a DNS resolver?
|
||
|
|
|
||
|
|
For DNS blacklist lookups and DNSSEC.
|
||
|
|
|
||
|
|
Most systems use either a public or a local caching DNS resolver.
|
||
|
|
That's a very bad idea when it comes to filter spam using DNS-based blackhole lists (DNSBL) or similar technics.
|
||
|
|
Most if not all providers apply a rate limit based on the DNS resolver that is used to query their service.
|
||
|
|
Using a public resolver like Googles 4x8, OpenDNS or any other shared DNS resolver like your ISPs will hit that limit very soon.
|
||
|
|
|
||
|
|
|