diff --git a/src/main/java/com/ffii/tsms/modules/common/mail/service/MailSenderService.kt b/src/main/java/com/ffii/tsms/modules/common/mail/service/MailSenderService.kt
index fce2c2b..bce6e31 100644
--- a/src/main/java/com/ffii/tsms/modules/common/mail/service/MailSenderService.kt
+++ b/src/main/java/com/ffii/tsms/modules/common/mail/service/MailSenderService.kt
@@ -29,7 +29,7 @@ open class MailSenderService(private val settingsService: SettingsService) {
             }
             props["mail.smtp.auth"] = auth
             props["mail.smtp.starttls.enable"] = "true"
-
+            props["mail.smtp.ssl.protocols"] = "TLSv1.2"
 
             sender.host = config.host
             sender.port = config.port!!