diff --git a/email_ui.py b/email_ui.py
index 9e8c491..6dac013 100644
--- a/email_ui.py
+++ b/email_ui.py
@@ -1,15 +1,15 @@
 # -*- coding: utf-8 -*-
 """
-email_ui.py  —  一键群发工具 (强化校验版)
---------------------------------------
+email_ui.py  —  一键群发工具 (强化校验版，支持自定义默认称呼)
+------------------------------------------------------------
 运行:  python email_ui.py
 """
-import os, logging, re, random
+import os, logging, re
 from datetime import datetime
 import gradio as gr
 from send_email_module import send_email
 
-EMAIL_CONFIG_KEY = "default"           # 对应 config/default.json
+EMAIL_CONFIG_KEY = "default"
 LOG_FILE = "email_send_log.txt"
 logging.basicConfig(level=logging.INFO,
                     format="%(asctime)s  %(levelname)s  %(message)s")
@@ -17,7 +17,7 @@ logging.basicConfig(level=logging.INFO,
 EMAIL_RE = re.compile(r"^[^@\s]+@[^@\s]+\.[^@\s]+$")   # 简易邮箱正则
 
 
-# -------------------- 工具 --------------------
+# ---------- 工具 ----------
 def _load_template(file_obj):
     if file_obj is None:
         return ""
@@ -25,36 +25,31 @@ def _load_template(file_obj):
         return f.read()
 
 
-def _error(msg):
-    """生成统一的红字提示 + 让 state 为空 -> Send 仍锁定"""
+def _error(msg):  # 统一红字提示
     return gr.update(value=f"<p style='color:red'>❌ {msg}</p>"), None
 
 
-# -------------------- 预览 --------------------
+# ---------- 预览 ----------
 def preview_email(to_addrs, subject, html_file, language,
-                  want_receipt, want_read_receipt):
-    # 0. 模板存在
+                  want_receipt, want_read_receipt, default_name):  # ✨ new
     tpl = _load_template(html_file)
     if not tpl:
         return _error("请先上传 HTML 模板")
 
-    # 1. 收件人非空且格式合法
     raw_addrs = [a.strip() for a in to_addrs.split(",") if a.strip()]
     if not raw_addrs:
         return _error("收件人邮箱不能为空")
     if invalid := [a for a in raw_addrs if not EMAIL_RE.match(a)]:
         return _error(f"邮箱格式非法: {', '.join(invalid)}")
 
-    # 2. 主题非空
     if not subject.strip():
         return _error("主题不能为空")
 
-    # 3. 模板至少包含 {{recipient_name}}
     if "{{recipient_name}}" not in tpl:
         return _error("模板缺少 {{recipient_name}} 占位符")
 
-    # ---- 全部通过，生成预览 ----
-    preview = (tpl.replace("{{recipient_name}}", "there")
+    # 生成预览，用用户填写的 default_name（留空时仍展示 there）
+    preview = (tpl.replace("{{recipient_name}}", default_name or "there")
                  .replace("{{recipient_email}}", "example@example.com")
                  .replace("{{encoded_recipient_email}}", "ENCODED_EXAMPLE")
                  .replace("{{timestamp}}", datetime.now().isoformat()))
@@ -66,18 +61,24 @@ def preview_email(to_addrs, subject, html_file, language,
         "language": language,
         "want_receipt": want_receipt,
         "want_read_receipt": want_read_receipt,
+        "default_name": default_name.strip(),           # ✨ new
     }
     return gr.update(value=preview), state
 
 
-# -------------------- 发送 --------------------
+# ---------- 发送 ----------
 def send_emails(state):
     if not state:
         return "⚠️ 请先 Preview 成功后再发送。"
+
     out_lines = []
     for addr in state["addresses"]:
         res = send_email(
-            EMAIL_CONFIG_KEY, addr, state["subject"], state["template"], "",
+            EMAIL_CONFIG_KEY,
+            addr,
+            state["subject"],
+            state["template"],
+            state["default_name"],              # ✨ new (可为空串)
             request_receipt=state["want_receipt"],
             request_read_receipt=state["want_read_receipt"],
             language=state["language"],
@@ -90,7 +91,7 @@ def send_emails(state):
     return "<br>".join(out_lines).replace("\n", "<br>")
 
 
-# -------------------- Gradio UI --------------------
+# ---------- Gradio UI ----------
 with gr.Blocks(css=".gr-button {min-width:8rem}") as demo:
     gr.Markdown("## ✉️ 简易 EDM 群发工具")
 
@@ -98,9 +99,13 @@ with gr.Blocks(css=".gr-button {min-width:8rem}") as demo:
     subj  = gr.Textbox(label="主题", placeholder="Subject here")
     tpl   = gr.File(label="上传 HTML 模板")
     lang  = gr.Radio(["english", "chinese"], value="chinese", label="语言")
+    default_name = gr.Textbox(                       # ✨ new
+        label="默认称呼（留空=老板/there）", value=""
+    )
+
     with gr.Row():
-        rcpt    = gr.Checkbox(label="投递回执")
-        read_r  = gr.Checkbox(label="已读回执")
+        rcpt   = gr.Checkbox(label="投递回执")
+        read_r = gr.Checkbox(label="已读回执")
 
     preview_btn = gr.Button("Preview ⬇️")
     send_btn    = gr.Button("Send (确认发送) ✈️", interactive=False)
@@ -109,7 +114,7 @@ with gr.Blocks(css=".gr-button {min-width:8rem}") as demo:
 
     preview_btn.click(
         preview_email,
-        [addrs, subj, tpl, lang, rcpt, read_r],
+        [addrs, subj, tpl, lang, rcpt, read_r, default_name],   # ✨ new
         [out_html, state_box]
     ).then(
         lambda s: gr.update(interactive=s is not None),
diff --git a/send_email_module.py b/send_email_module.py
index a9e73b3..3037dcf 100644
--- a/send_email_module.py
+++ b/send_email_module.py
@@ -84,7 +84,7 @@ def send_email(key, to_address, subject, body_template, recipient_name,
         msg['Subject'] = subject
 
         if not recipient_name:
-            recipient_name = "there"
+            recipient_name = "老板" if language == "chinese" else "there"
 
         encoded_email = xor_encode(to_address, 0xAE)
         body = (