Rspamd Keyword Filter

Installation und Basisdienste

• apt update
• apt install rspamd dovecot-core dovecot-sieve
• systemctl enable --now rspamd

Controller-Passwort setzen

Hash generieren

• rspamadm pw

Konfiguration des Worker-Controllers

• vi /etc/rspamd/override.d/worker-controller.inc

password = "$2$DEIN_HASH_HIER";
enable_password = "$2$DEIN_HASH_HIER";
bind_socket = [
    "*:11334",
    "/run/rspamd/controller.sock mode=0660"
];

dovecot zur Gruppe _rspamd hinzufügen

• usermod -a -G _rspamd dovecot

• systemctl restart rspamd

Postfix-Integration

• postconf -e "smtpd_milters=inet:127.0.0.1:11332"
• postconf -e "non_smtpd_milters=inet:127.0.0.1:11332"
• postconf -e "milter_default_action=accept"
• postfix reload

Bayes-Filter aktivieren

• vi /etc/rspamd/local.d/classifier-bayes.conf

backend = "sqlite3";
path = "/var/lib/rspamd/bayes.sqlite";
min_tokens = 11;
new_schema = true;
autolearn = true;

• systemctl restart rspamd

IMAPSieve / Dovecot-Integration (Training über Mail-Verschieben)

• vi /etc/dovecot/conf.d/90-sieve.conf

plugin {
    sieve = ~/.dovecot.sieve
    sieve_global = /var/lib/dovecot/sieve/spam-to-junk.sieve
    sieve_global_extensions = +vnd.dovecot.pipe
    sieve_pipe_bin_dir = /usr/local/bin
}

• vi /etc/dovecot/conf.d/90-imapsieve.conf

plugin {
    imapsieve = yes
    sieve_plugins = sieve_imapsieve sieve_extprograms

    imapsieve_mailbox1_name = Junk
    imapsieve_mailbox1_causes = COPY APPEND
    imapsieve_mailbox1_before = file:/var/lib/dovecot/sieve/report-spam.sieve

    imapsieve_mailbox2_name = *
    imapsieve_mailbox2_from = Junk
    imapsieve_mailbox2_causes = COPY APPEND
    imapsieve_mailbox2_before = file:/var/lib/dovecot/sieve/report-ham.sieve
}

• vi /etc/dovecot/conf.d/20-imap.conf

mail_plugins = $mail_plugins imap_sieve imap_filter_sieve

• Sieve-Skript für Spam-Verschiebung erstellen
• vi /var/lib/dovecot/sieve/spam-to-junk.sieve

require ["fileinto"];

if header :contains "X-Spam" "Yes" {
    fileinto "Junk";
    stop;
}

• Sieve-Skript kompilieren
• sievec /var/lib/dovecot/sieve/spam-to-junk.sieve

• Rechte korrigieren
• chown dovecot:dovecot /var/lib/dovecot/sieve/spam-to-junk.sieve
• chmod 644 /var/lib/dovecot/sieve/spam-to-junk.sieve

• Hinweis: Der "Junk"-Ordner muss in allen Postfächern vorhanden sein

Sieve-Skripte bereitstellen

• mkdir -p /var/lib/dovecot/sieve
• chown -R dovecot:dovecot /var/lib/dovecot/sieve
• vi /var/lib/dovecot/sieve/report-spam.sieve

 
require ["vnd.dovecot.pipe", "copy", "imapsieve"];
pipe "rspamd-learn-spam";

• vi /var/lib/dovecot/sieve/report-ham.sieve

 
require ["vnd.dovecot.pipe", "copy", "imapsieve"]; 
pipe "rspamd-learn-ham"; 

Ausführbare Lernskripte für Rspamd

• vi /usr/local/bin/rspamd-learn-spam

#!/bin/sh
exec /usr/bin/rspamc -h /run/rspamd/controller.sock learn_spam

• vi /usr/local/bin/rspamd-learn-ham

#!/bin/sh
exec /usr/bin/rspamc -h /run/rspamd/controller.sock learn_ham

• chmod +x /usr/local/bin/rspamd-learn-*

Dovecot final neu starten

• rm -f /var/lib/dovecot/sieve/*.svbin
• systemctl restart dovecot

Rspamd-Funktionstest

rspamc sollte Bayes anzeigen

• rspamc -h /run/rspamd/controller.sock stat

Manueller Test

Einzelscan

• rspamc symbols < testmail.eml

Manuelles Lernen

• rspamc -h /run/rspamd/controller.sock learn_spam < spam.eml
• rspamc -h /run/rspamd/controller.sock learn_ham < ham.eml