FROM debian:stable-slim

# Install Postfix and tools
RUN apt-get update && \
    DEBIAN_FRONTEND=noninteractive apt-get install -y \
        postfix \
        postfix-mysql \
        libsasl2-modules \
        mailutils \
        gettext-base \
        netcat-openbsd \
        python3 \
        python3-pymysql \
        && apt-get clean && rm -rf /var/lib/apt/lists/*

# Copy configs
COPY main.cf.template /etc/postfix/main.cf.template
COPY sasl_passwd.template /etc/postfix/sasl_passwd.template
COPY mysql_virtual_alias_maps.cf /etc/postfix/mysql_virtual_alias_maps.cf.template
COPY sender_access /etc/postfix/sender_access
COPY smtp_generic /etc/postfix/smtp_generic
COPY aliases /etc/aliases
COPY process-bounce.py /usr/local/bin/process-bounce.py
COPY entrypoint.sh /entrypoint.sh
RUN chmod +x /entrypoint.sh /usr/local/bin/process-bounce.py

# Generate Postfix maps for sender access, sender canonical, and aliases
RUN postmap /etc/postfix/sender_access && \
    postmap /etc/postfix/smtp_generic && \
    newaliases

# Expose SMTP
EXPOSE 25

ENTRYPOINT ["/entrypoint.sh"]