diff --git a/backend/cmd/main.go b/backend/cmd/main.go
index 1719575..d676059 100644
--- a/backend/cmd/main.go
+++ b/backend/cmd/main.go
@@ -1,6 +1,7 @@
 package main
 
 import (
+	"bytes"
 	"encoding/json"
 	"fmt"
 	"io"
@@ -361,10 +362,84 @@ func handleMailServices(w http.ResponseWriter, r *http.Request) {
 }
 
 func handleTestMailService(w http.ResponseWriter, r *http.Request) {
-	api.Success(w, map[string]interface{}{
-		"connected": true,
-		"message":   "邮箱服务测试成功",
-	})
+	if r.Method != http.MethodPost {
+		api.Error(w, http.StatusMethodNotAllowed, "仅支持 POST")
+		return
+	}
+
+	var req struct {
+		Name     string `json:"name"`
+		APIBase  string `json:"api_base"`
+		APIToken string `json:"api_token"`
+		Domain   string `json:"domain"`
+	}
+
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		api.Error(w, http.StatusBadRequest, "解析请求失败")
+		return
+	}
+
+	logger.Info(fmt.Sprintf("测试邮箱服务: %s (%s)", req.Name, req.Domain), "", "mail")
+	logger.Info(fmt.Sprintf("API Base: %s", req.APIBase), "", "mail")
+
+	// 创建测试请求
+	testEmail := "test@" + req.Domain
+	payload := map[string]interface{}{
+		"list": []map[string]string{
+			{"email": testEmail, "password": "TestPass123#"},
+		},
+	}
+	jsonData, _ := json.Marshal(payload)
+
+	apiURL := req.APIBase + "/api/public/addUser"
+	httpReq, err := http.NewRequest("POST", apiURL, bytes.NewBuffer(jsonData))
+	if err != nil {
+		logger.Error(fmt.Sprintf("创建请求失败: %v", err), "", "mail")
+		api.Error(w, http.StatusInternalServerError, "创建请求失败")
+		return
+	}
+
+	httpReq.Header.Set("Authorization", req.APIToken)
+	httpReq.Header.Set("Content-Type", "application/json")
+
+	client := &http.Client{Timeout: 10 * time.Second}
+	resp, err := client.Do(httpReq)
+	if err != nil {
+		logger.Error(fmt.Sprintf("请求失败: %v", err), "", "mail")
+		api.Error(w, http.StatusBadGateway, fmt.Sprintf("连接失败: %v", err))
+		return
+	}
+	defer resp.Body.Close()
+
+	bodyBytes, _ := io.ReadAll(resp.Body)
+	bodyStr := string(bodyBytes)
+
+	logger.Info(fmt.Sprintf("响应状态: %d", resp.StatusCode), "", "mail")
+	logger.Info(fmt.Sprintf("响应内容: %s", bodyStr), "", "mail")
+
+	// 解析响应
+	var result struct {
+		Code    int    `json:"code"`
+		Message string `json:"message"`
+	}
+	if err := json.Unmarshal(bodyBytes, &result); err != nil {
+		logger.Error(fmt.Sprintf("解析响应失败: %v", err), "", "mail")
+		api.Error(w, http.StatusInternalServerError, "解析响应失败")
+		return
+	}
+
+	// 判断结果
+	if result.Code == 200 || strings.Contains(result.Message, "exist") {
+		logger.Success(fmt.Sprintf("邮箱服务测试成功: %s", req.Name), "", "mail")
+		api.Success(w, map[string]interface{}{
+			"connected": true,
+			"message":   "邮箱服务连接成功",
+			"response":  result,
+		})
+	} else {
+		logger.Error(fmt.Sprintf("邮箱服务测试失败: %s - %s", req.Name, result.Message), "", "mail")
+		api.Error(w, http.StatusBadRequest, fmt.Sprintf("API 错误: %s", result.Message))
+	}
 }
 
 func handleGetOwners(w http.ResponseWriter, r *http.Request) {
diff --git a/backend/internal/api/team_process.go b/backend/internal/api/team_process.go
index 62c38b6..cc02352 100644
--- a/backend/internal/api/team_process.go
+++ b/backend/internal/api/team_process.go
@@ -258,6 +258,7 @@ func processSingleTeam(idx int, req TeamProcessRequest) TeamProcessResult {
 	if owner.AccountID != "" {
 		// 直接使用数据库中存储的 account_id
 		teamID = owner.AccountID
+		inviter.SetAccountID(teamID) // 必须设置到 inviter 中
 		logger.Info(fmt.Sprintf("%s 使用已存储的 Team ID: %s", logPrefix, teamID), owner.Email, "team")
 	} else {
 		// 如果没有存储，才请求 API 获取
diff --git a/backend/internal/invite/team.go b/backend/internal/invite/team.go
index 103d335..b0d3877 100644
--- a/backend/internal/invite/team.go
+++ b/backend/internal/invite/team.go
@@ -54,6 +54,11 @@ func NewWithProxy(accessToken, proxy string) *TeamInviter {
 	}
 }
 
+// SetAccountID 手动设置 account_id（当已有存储值时使用）
+func (t *TeamInviter) SetAccountID(accountID string) {
+	t.accountID = accountID
+}
+
 // GetAccountID 获取 Team 的 account_id (workspace_id)
 func (t *TeamInviter) GetAccountID() (string, error) {
 	req, _ := http.NewRequest("GET", "https://chatgpt.com/backend-api/accounts/check/v4-2023-04-27", nil)
diff --git a/frontend/src/pages/EmailConfig.tsx b/frontend/src/pages/EmailConfig.tsx
index 43d57de..2b6410f 100644
--- a/frontend/src/pages/EmailConfig.tsx
+++ b/frontend/src/pages/EmailConfig.tsx
@@ -76,6 +76,7 @@ export default function EmailConfig() {
                 method: 'POST',
                 headers: { 'Content-Type': 'application/json' },
                 body: JSON.stringify({
+                    name: service.name,
                     api_base: service.apiBase,
                     api_token: service.apiToken,
                     domain: service.domain,