Initial commit.

Dockerfile

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+FROM alpine:3
+
+LABEL org.opencontainers.image.authors="markus@birth-online.de"
+
+ENV container=docker \
+    LC_ALL=C
+
+RUN apk add --no-cache \
+  tini \
+  dovecot \
+  dovecot-gssapi \
+  dovecot-ldap \
+  dovecot-lmtpd \
+  dovecot-mysql \
+  dovecot-pgsql \
+  dovecot-pop3d \
+  dovecot-fts-solr \
+  dovecot-sqlite \
+  dovecot-submissiond \
+  ca-certificates && \
+  mkdir /conf && \
+  echo "!include_try /conf/*.conf" >> /etc/dovecot/dovecot.conf && \
+  mkdir /data && \
+  addgroup -g 1000 vmail && \
+  adduser -h /data -u 1000 -D -G vmail vmail && \
+  chown vmail:vmail /data
+
+COPY local.conf /conf/local.conf
+
+VOLUME ["/conf", "/data"]
+ENTRYPOINT ["/sbin/tini", "--"]
+CMD ["/usr/sbin/dovecot", "-F"]
+
+# LMTP
+EXPOSE 24
+# SMTP
+EXPOSE 25
+# POP3
+EXPOSE 110
+# IMAP
+EXPOSE 143
+# SMTPS
+EXPOSE 465
+# Submission
+EXPOSE 587
+# IMAPS
+EXPOSE 993
+# POP3S
+EXPOSE 995

README.md

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+docker-dovecot
+==============
+
+Based on [dovecot/docker](https://github.com/dovecot/docker).

local.conf

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+## You should mount /etc/dovecot if you want to
+## manage this file
+
+mail_home=/data/%Lu
+mail_location=sdbox:~/Mail
+mail_uid=1000
+mail_gid=1000
+
+protocols = imap pop3 submission lmtp
+ssl = no
+disable_plaintext_auth = yes                                                                                   
+auth_mechanisms = plain login cram-md5 digest-md5 scram-sha-1 scram-sha-256
+
+first_valid_uid = 1000
+last_valid_uid = 1000
+
+userdb {
+  driver = passwd
+  args = blocking=no
+}
+
+passdb {
+  driver = static
+  args = password=pass
+}
+
+ssl=no
+
+namespace {
+  inbox = yes
+  separator = /
+  name = inbox
+}
+
+service lmtp {
+  inet_listener {
+    port = 24
+  }
+}
+
+listen = *
+
+log_path=/dev/stdout
+info_log_path=/dev/stdout
+debug_log_path=/dev/stdout
+