Palier 3: Postfix + Dovecot working! Mail test successful with swaks

docker-compose.yml

@@ -0,0 +1,38 @@
+version: '3.9'
+
+services:
+  dovecot:
+    build:
+      context: .
+      dockerfile: dovecot/Dockerfile
+    container_name: mailstack-dovecot
+    ports:
+      - "1143:143"   # IMAP
+      - "1993:993"   # IMAPS
+    volumes:
+      - vmail:/var/mail/vhosts
+    networks:
+      - mailstack
+
+  postfix:
+    build:
+      context: .
+      dockerfile: postfix/Dockerfile
+    container_name: mailstack-postfix
+    ports:
+      - "1025:25"     # SMTP
+      - "1587:587"    # SMTP + AUTH
+      - "1465:465"    # SMTPS
+    volumes:
+      - vmail:/var/mail/vhosts
+    networks:
+      - mailstack
+    depends_on:
+      - dovecot
+
+volumes:
+  vmail:
+
+networks:
+  mailstack:
+    driver: bridge

dovecot/Dockerfile

@@ -1,22 +1,17 @@
-# Image de base Alpine
+FROM debian:bookworm-slim
-FROM alpine:3.21
 
-# Installer Dovecot (IMAP/POP3) + le module d'authentification
+RUN apt-get update && apt-get install -y dovecot-core dovecot-imapd
-RUN apk add --no-cache dovecot
 
-# --- Utilisateur vmail identique à celui de Postfix (uid/gid 5000) ---
+RUN mkdir -p /var/mail/vhosts && \
-RUN (deluser vmail 2>/dev/null || true) \
+    useradd -m -u 5000 -d /var/mail/vhosts vmail || true
-    && (delgroup vmail 2>/dev/null || true) \
-    && addgroup -g 5000 vmail \
-    && adduser -D -u 5000 -G vmail -h /var/mail/vhosts vmail \
-    && mkdir -p /var/mail/vhosts
 
-# --- Copier nos fichiers de config dans l'image ---
+COPY ../share/users.txt /tmp/users.txt
-COPY dovecot.conf /etc/dovecot/dovecot.conf
+COPY ../share/dovecot.sh /tmp/dovecot.sh
-COPY users /etc/dovecot/users
+
+RUN chmod +x /tmp/dovecot.sh && \
+    /tmp/dovecot.sh > /etc/dovecot/users && \
+    rm /tmp/users.txt /tmp/dovecot.sh
 
-# Exposer les ports IMAP
 EXPOSE 143 993
 
-# Lancer Dovecot au premier plan
 CMD ["dovecot", "-F"]

postfix/Dockerfile

@@ -1,43 +1,18 @@
-# Image de base Alpine, légère
+FROM debian:bookworm-slim
-FROM alpine:3.21
 
-# Installer Postfix et les outils
+RUN apt-get update && apt-get install -y postfix mailutils
-RUN apk add --no-cache postfix postfix-pcre rsyslog
 
-# --- Utilisateur dédié au stockage des mails virtuels ---
+COPY ../share/users.txt /tmp/users.txt
-# Tous les mails appartiendront à cet utilisateur "vmail" (uid/gid 5000)
+COPY ../share/postfix.sh /tmp/postfix.sh
-# Supprimer le vmail créé par défaut par Postfix, puis recréer le nôtre en uid/gid 5000
+COPY postfix/main.cf /etc/postfix/main.cf
-RUN (deluser vmail 2>/dev/null || true) \
+COPY postfix/entrypoint.sh /entrypoint.sh
-    && (delgroup vmail 2>/dev/null || true) \
-    && addgroup -g 5000 vmail \
-    && adduser -D -u 5000 -G vmail -h /var/mail/vhosts vmail \
-    && mkdir -p /var/mail/vhosts/ayoinc.test \
-    && chown -R vmail:vmail /var/mail/vhosts
-# --- Configuration Postfix de base ---
-RUN postconf -e "myhostname = mail.ayoinc.test" \
-    && postconf -e "mydomain = ayoinc.test" \
-    && postconf -e "myorigin = \$mydomain" \
-    # Postfix ne gère PAS lui-même notre domaine en "local" : c'est du virtuel
-    && postconf -e "mydestination = localhost" \
-    && postconf -e "inet_interfaces = all" \
-    && postconf -e "inet_protocols = ipv4"
 
-# --- Configuration des boîtes virtuelles ---
+RUN chmod 644 /etc/postfix/main.cf && \
-RUN postconf -e "virtual_mailbox_domains = ayoinc.test" \
+    chmod +x /tmp/postfix.sh /entrypoint.sh && \
-    && postconf -e "virtual_mailbox_base = /var/mail/vhosts" \
+    /tmp/postfix.sh > /etc/postfix/virtual_mailbox && \
-    && postconf -e "virtual_mailbox_maps = lmdb:/etc/postfix/vmailbox" \
+    postmap /etc/postfix/virtual_mailbox && \
-    && postconf -e "virtual_minimum_uid = 5000" \
+    rm /tmp/users.txt /tmp/postfix.sh
-    && postconf -e "virtual_uid_maps = static:5000" \
-    && postconf -e "virtual_gid_maps = static:5000"
 
-# --- Déclaration des comptes virtuels (alice & bob) ---
+EXPOSE 25 587
-# Chaque ligne : adresse -> chemin Maildir (le / final = format Maildir)
-RUN echo "alice@ayoinc.test    ayoinc.test/alice/" >  /etc/postfix/vmailbox \
-    && echo "bob@ayoinc.test      ayoinc.test/bob/"   >> /etc/postfix/vmailbox \
-    && postmap lmdb:/etc/postfix/vmailbox
 
-# Exposer le port SMTP
+CMD ["/entrypoint.sh"]
-EXPOSE 25
-
-# Lancer Postfix au premier plan
-CMD ["postfix", "start-fg"]

postfix/entrypoint.sh

@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+postfix start
+tail -f /dev/null

postfix/main.cf

@@ -0,0 +1,15 @@
+myhostname = mail.ayoinc.test
+myorigin = ayoinc.test
+mydestination = localhost
+mynetworks = 127.0.0.0/8 [::1]/128
+inet_interfaces = all
+
+virtual_mailbox_domains = ayoinc.test
+virtual_mailbox_base = /var/mail/vhosts
+virtual_mailbox_maps = hash:/etc/postfix/virtual_mailbox
+virtual_uid_maps = static:5000
+virtual_gid_maps = static:5000
+virtual_transport = virtual
+
+smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
+maillog_file = /dev/stdout

share/dovecot.sh

@@ -3,4 +3,4 @@
 while IFS= read -r email; do
     username="${email%@*}"
     echo "${email}:{PLAIN}${username}"
-done < users.txt
+done < /tmp/users.txt

share/postfix.sh

@@ -4,4 +4,4 @@ while IFS= read -r email; do
     username="${email%@*}"
     domain="${email#*@}"
     echo "${email}    ${domain}/${username}/"
-done < users.txt
+done < /tmp/users.txt