first commit

base/opensmtpd/6.6.1p1/Dockerfile

@@ -0,0 +1,27 @@
+FROM ubuntu:focal
+
+LABEL maintainer="ph1sh && phithon <root@leavesongs.com>"
+
+RUN set -ex \
+    && apt-get update \
+    && apt-get install --no-install-recommends -y ca-certificates wget bison autoconf automake gcc make libc-dev libasr-dev libssl-dev libevent-dev zlib1g-dev \
+    && cd /usr/src \
+    && wget -qO- https://www.opensmtpd.org/archives/opensmtpd-6.6.1p1.tar.gz | tar xz --strip-components=1 \
+    && ./configure \
+    && make \
+    && make install \
+    && cd / \
+    && apt-get purge -y --auto-remove bison autoconf automake gcc make \
+    && rm -rf /var/lib/apt/lists/* /usr/src/*
+
+RUN set -ex \
+    && mkdir /var/empty \
+    && useradd -c "SMTP Daemon" -d /var/empty -s /sbin/nologin _smtpd \
+    && useradd -c "SMTPD Queue" -d /var/empty -s /sbin/nologin _smtpq
+
+COPY aliases /etc/
+COPY smtpd.conf /usr/local/etc/
+
+WORKDIR /tmp
+EXPOSE 25
+CMD ["smtpd", "-dv"]

base/opensmtpd/6.6.1p1/aliases

@@ -0,0 +1,13 @@
+abuse:      root
+noc:        root
+security:   root
+
+# RFC 2142 SUPPORT MAILBOX NAMES FOR SPECIFIC INTERNET SERVICES
+postmaster: root
+hostmaster: root
+# usenet:   root
+# news:     usenet
+webmaster:  root
+www:        webmaster
+# uucp:     root
+ftp:        root

base/opensmtpd/6.6.1p1/smtpd.conf

@@ -0,0 +1,7 @@
+table aliases file:/etc/aliases
+listen on "0.0.0.0"
+action "local" mbox alias <aliases>
+action "relay" relay
+match for local action "local"
+match from local for any action "relay"
+match from any for any action "local"