diff --git a/server/adminserver/api/v1/system/mail.go b/server/adminserver/api/v1/system/mail.go
index a1e1f401..f0b15536 100644
--- a/server/adminserver/api/v1/system/mail.go
+++ b/server/adminserver/api/v1/system/mail.go
@@ -30,7 +30,7 @@ func (this *MailApi) ListMail(c *gin.Context) {
 		return
 	}
 	orderBy := ""
-	sql := "SELECT * FROM t_mail WHERE 1=1 and unikey is not null "
+	sql := fmt.Sprintf("SELECT * FROM t_mail WHERE 1=1 AND tag1 = %d unikey is not null ", jccommon.MAIL_TAG1_CUSTOM)
 	subFilters := []f5.DbQueryFilter{
 		f5.GetDbFilter().Custom("deleted = 0").And(),
 	}