diff --git a/telegram_bot.py b/telegram_bot.py
index 3af170b..416c1dc 100644
--- a/telegram_bot.py
+++ b/telegram_bot.py
@@ -3077,13 +3077,14 @@ class ProvisionerBot:
 
     async def _cloudmail_add_domain(self, update: Update, domain: str):
         """添加 Cloud Mail 域名"""
+        message = get_message(update)
         try:
             import tomli_w
             from config import CONFIG_FILE, EMAIL_DOMAINS
             import tomllib
             
             if domain in EMAIL_DOMAINS:
-                await update.message.reply_text(f"⚠️ 域名 {domain} 已存在")
+                await message.reply_text(f"⚠️ 域名 {domain} 已存在")
                 return
             
             # 读取配置
@@ -3107,21 +3108,22 @@ class ProvisionerBot:
             from config import reload_config
             reload_config()
             
-            await update.message.reply_text(f"✅ 已添加域名: {domain}")
+            await message.reply_text(f"✅ 已添加域名: {domain}")
         except ImportError:
-            await update.message.reply_text("❌ 缺少 tomli_w 依赖\n请运行: uv add tomli_w")
+            await message.reply_text("❌ 缺少 tomli_w 依赖\n请运行: uv add tomli_w")
         except Exception as e:
-            await update.message.reply_text(f"❌ 添加失败: {e}")
+            await message.reply_text(f"❌ 添加失败: {e}")
 
     async def _cloudmail_del_domain(self, update: Update, domain: str):
         """删除 Cloud Mail 域名"""
+        message = get_message(update)
         try:
             import tomli_w
             from config import CONFIG_FILE, EMAIL_DOMAINS
             import tomllib
             
             if domain not in EMAIL_DOMAINS:
-                await update.message.reply_text(f"⚠️ 域名 {domain} 不存在")
+                await message.reply_text(f"⚠️ 域名 {domain} 不存在")
                 return
             
             # 读取配置
@@ -3139,11 +3141,11 @@ class ProvisionerBot:
             from config import reload_config
             reload_config()
             
-            await update.message.reply_text(f"✅ 已删除域名: {domain}")
+            await message.reply_text(f"✅ 已删除域名: {domain}")
         except ImportError:
-            await update.message.reply_text("❌ 缺少 tomli_w 依赖\n请运行: uv add tomli_w")
+            await message.reply_text("❌ 缺少 tomli_w 依赖\n请运行: uv add tomli_w")
         except Exception as e:
-            await update.message.reply_text(f"❌ 删除失败: {e}")
+            await message.reply_text(f"❌ 删除失败: {e}")
 
     @admin_only
     async def cmd_test_email(self, update: Update, context: ContextTypes.DEFAULT_TYPE):
@@ -4516,12 +4518,24 @@ class ProvisionerBot:
                 }
                 
                 response = requests.post(url, headers=headers, json=payload, timeout=10)
-                data = response.json()
+                
+                # 检查响应状态码
+                if response.status_code != 200:
+                    return False, f"HTTP {response.status_code}: {response.text[:100]}"
+                
+                # 检查响应内容
+                if not response.text or not response.text.strip():
+                    return False, "API 返回空响应"
+                
+                try:
+                    data = response.json()
+                except Exception:
+                    return False, f"API 返回非 JSON 格式: {response.text[:100]}"
                 
                 if data.get("code") == 200:
                     return True, "API 连接正常"
                 else:
-                    return False, data.get("message", "未知错误")
+                    return False, data.get("message", f"错误码: {data.get('code')}")
             
             return False, "未知的邮箱服务类型"