feat: 增加SMTP测试环境

TestDocker/SMTP/Dockerfile

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+FROM ubuntu:20.04
+
+ENV DEBIAN_FRONTEND=noninteractive
+
+# 安装必要的软件
+RUN apt-get update && apt-get install -y \
+    postfix \
+    sasl2-bin \
+    libsasl2-modules \
+    mailutils \
+    rsyslog \
+    && rm -rf /var/lib/apt/lists/*
+
+# 配置Postfix
+RUN postconf -e 'smtpd_sasl_auth_enable = yes' \
+    && postconf -e 'smtpd_sasl_security_options = noanonymous' \
+    && postconf -e 'smtpd_sasl_local_domain =' \
+    && postconf -e 'broken_sasl_auth_clients = yes' \
+    && postconf -e 'smtpd_recipient_restrictions = permit_sasl_authenticated,permit_mynetworks,reject_unauth_destination' \
+    && postconf -e 'inet_interfaces = all'
+
+# 配置SASL
+RUN mkdir -p /etc/postfix/sasl/
+RUN echo "pwcheck_method: auxprop" > /etc/postfix/sasl/smtpd.conf \
+    && echo "auxprop_plugin: sasldb" >> /etc/postfix/sasl/smtpd.conf \
+    && echo "mech_list: PLAIN LOGIN" >> /etc/postfix/sasl/smtpd.conf
+
+# 创建SASL用户（使用固定域名localhost）
+RUN echo "123456" | saslpasswd2 -p -c -u localhost test
+RUN echo "admin123" | saslpasswd2 -p -c -u localhost admin
+RUN echo "root123" | saslpasswd2 -p -c -u localhost root
+
+# 设置权限
+RUN chown postfix:postfix /etc/sasldb2
+
+# 创建日志目录和文件
+RUN mkdir -p /var/log && \
+    touch /var/log/mail.log && \
+    chmod 644 /var/log/mail.log
+
+# 开放端口
+EXPOSE 25
+
+# 创建启动脚本
+RUN echo '#!/bin/bash' > /start.sh \
+    && echo 'service rsyslog start' >> /start.sh \
+    && echo 'service postfix start' >> /start.sh \
+    && echo 'tail -f /var/log/mail.log' >> /start.sh \
+    && chmod +x /start.sh
+
+CMD ["/start.sh"]

TestDocker/SMTP/README.txt

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+docker build -t smtp-weak .
+docker run -d --name smtp-test -p 25:25 smtp-weak

TestDocker/SMTP/start.sh

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+#!/bin/bash
+service postfix start
+tail -f /var/log/mail.log