change application.yml

src/main/resources/application.yml

@@ -4,10 +4,11 @@ spring:
     username: seecoder@163.com
     password: seec67NJU
     default-encoding: UTF-8
+    protocol: smtp
     properties:
-      mail:
-        smtp:
-          auth: true
-          starttls:
-            enable: true
-            required: true
+      mail.smtp.auth: true
+      mail.smtp.starttls.enable: true
+      mail.smtp.starttls.required: true
+      mail.smtp.socketFactory.port: 465
+      mail.smtp.socketFactory.class: javax.net.ssl.SSLSocketFactory
+      mail.smtp.socketFactory.fallback: false