diff --git a/mailx.go b/mailx.go
index 79ba942..dada30b 100644
--- a/mailx.go
+++ b/mailx.go
@@ -8,7 +8,7 @@ import (
 	"code.yun.ink/pkg/mailx/smtp"
 )
 
-var Platform *interfaces.DefaultEmailFactory
+var Platform interfaces.EmailFactoryInterface
 
 // 注册
 func init() {