diff --git a/src/services/mailService.js b/src/services/mailService.js
index fa7fe81..7988dbe 100644
--- a/src/services/mailService.js
+++ b/src/services/mailService.js
@@ -46,6 +46,24 @@ class MailService {
             }
         });
     }
+	
+	/**
+     * 手動發送郵件方法 (供 API 呼叫)
+     */
+    async sendSingleMail(mailto, mailtitle, mailtext) {
+        try {
+            await this.transporter.sendMail({
+                from: 'kylinsys@gmail.com',
+                to: mailto,
+                subject: mailtitle,
+                text: mailtext
+            });
+            return { success: true };
+        } catch (error) {
+            logger.error(`單筆郵件發送失敗: ${error.message}`);
+            return { success: false, error: error.message };
+        }
+    }
 }
 
 module.exports = new MailService();
\ No newline at end of file