diff --git a/xxl-job-admin/src/main/resources/application.properties b/xxl-job-admin/src/main/resources/application.properties
index 3d13f9a2..ad8be387 100644
--- a/xxl-job-admin/src/main/resources/application.properties
+++ b/xxl-job-admin/src/main/resources/application.properties
@@ -37,6 +37,7 @@ spring.mail.password=xxx
 spring.mail.properties.mail.smtp.auth=true
 spring.mail.properties.mail.smtp.starttls.enable=true
 spring.mail.properties.mail.smtp.starttls.required=true
+spring.mail.properties.mail.smtp.socketFactory.class=javax.net.ssl.SSLSocketFactory
 
 ### xxl-job, access token
 xxl.job.accessToken=