diff --git a/messenger.js b/messenger.js
index caba79c..d119662 100644
--- a/messenger.js
+++ b/messenger.js
@@ -18,7 +18,9 @@ module.exports = {
     return await util.promisify(my.smtpTransporter.sendMail).call(my.smtpTransporter, messageObject)
   },
   
-  async sendSms ({ phone, vendor, 
+  async sendSms ({ 
+    phone, 
+    vendor = my.envar?.SMS?.vendor || wo?.envar?.SMS?.vendor,
     msg, // for vendor==='DXTON'
     msgParam, msgTemplate, // for ['ALIYUN','UNICLOUD'].includes(vendor)
     signName, // for vendor==='ALIYUN', 'TENCENT'