Email bounce handling with postfix

postfix/Dockerfile

@@ -9,6 +9,8 @@ RUN apt-get update && \
         mailutils \
         gettext-base \
         netcat-openbsd \
+        python3 \
+        python3-pymysql \
         && apt-get clean && rm -rf /var/lib/apt/lists/*
 
 # Copy configs
@@ -16,11 +18,16 @@ 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
+RUN chmod +x /entrypoint.sh /usr/local/bin/process-bounce.py
 
-# Generate Postfix maps for sender access
-RUN postmap /etc/postfix/sender_access
+# 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