Initial: stack mail Postfix + Dovecot sur Alpine
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22
dovecot/Dockerfile
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22
dovecot/Dockerfile
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# Image de base Alpine
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FROM alpine:3.21
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# Installer Dovecot (IMAP/POP3) + le module d'authentification
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RUN apk add --no-cache dovecot
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# --- Utilisateur vmail identique à celui de Postfix (uid/gid 5000) ---
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RUN (deluser vmail 2>/dev/null || true) \
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&& (delgroup vmail 2>/dev/null || true) \
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&& addgroup -g 5000 vmail \
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&& adduser -D -u 5000 -G vmail -h /var/mail/vhosts vmail \
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&& mkdir -p /var/mail/vhosts
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# --- Copier nos fichiers de config dans l'image ---
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COPY dovecot.conf /etc/dovecot/dovecot.conf
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COPY users /etc/dovecot/users
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# Exposer les ports IMAP
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EXPOSE 143 993
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# Lancer Dovecot au premier plan
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CMD ["dovecot", "-F"]
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29
dovecot/dovecot.conf
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29
dovecot/dovecot.conf
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# Protocoles servis
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protocols = imap
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# Écouter sur toutes les interfaces
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listen = *
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# --- Emplacement des boîtes : le même Maildir que Postfix ---
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mail_location = maildir:/var/mail/vhosts/%d/%n
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# %d = domaine (ayoinc.test), %n = partie locale (alice, bob)
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# --- Authentification ---
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disable_plaintext_auth = no
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auth_mechanisms = plain login
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# Base d'utilisateurs : un fichier passwd-file
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passdb {
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driver = passwd-file
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args = scheme=PLAIN username_format=%u /etc/dovecot/users
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}
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userdb {
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driver = static
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args = uid=5000 gid=5000 home=/var/mail/vhosts/%d/%n
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}
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# Désactiver SSL pour l'instant (on l'ajoutera proprement après)
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ssl = no
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# Logs vers la sortie standard (pratique pour podman logs)
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log_path = /dev/stderr
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2
dovecot/users
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2
dovecot/users
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alice@ayoinc.test:{PLAIN}alice
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bob@ayoinc.test:{PLAIN}bob
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