diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..a3d0150
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,23 @@
+# -------- Dockerfile (email_sender/Dockerfile) --------
+FROM python:3.10-slim
+
+# ---- 基础优化 ----
+ENV PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONUNBUFFERED=1
+
+WORKDIR /app
+
+# 先装依赖，充分利用 Docker 缓存
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# 再放项目源代码
+COPY . .
+
+# ---- Gradio 运行参数 ----
+ENV GRADIO_SERVER_PORT=7880 \
+    GRADIO_SERVER_NAME=0.0.0.0
+
+EXPOSE 7880
+
+CMD ["python", "email_ui.py"]
diff --git a/email_ui.py b/email_ui.py
index d38c261..794e6bc 100644
--- a/email_ui.py
+++ b/email_ui.py
@@ -86,5 +86,5 @@ with gr.Blocks(css=".gr-button {min-width:6rem}") as demo:
     send_btn.click(send_emails, state_box, out_html)
 
 if __name__ == "__main__":
-    demo.queue().launch()
+    demo.queue().launch(server_port=7880)