diff --git a/server/mailserver/api/mailmgr.go b/server/mailserver/api/mailmgr.go
index 24cf7091..52027916 100644
--- a/server/mailserver/api/mailmgr.go
+++ b/server/mailserver/api/mailmgr.go
@@ -33,7 +33,7 @@ func (api *MailMgrApi) GetMailList(c *gin.Context) {
 
 type sendMailReq struct {
 	GameId      int    `form:"gameid" binding:"required"`
-	To          string `form:"to" binding:"min=0,max=60"`
+	To          string `form:"to" binding:"min=0"`
 	From        string `form:"from" binding:"min=0,max=60"`
 	MailType    int    `form:"mailtype" binding:"min=0,max=2"`
 	MailSubType int    `form:"mailsubtype" binding:""`
@@ -48,6 +48,7 @@ type sendMailReq struct {
 
 func (api *MailMgrApi) SendMail(c *gin.Context) {
 	var req sendMailReq
+	// ShouldBindJSON
 	if err := c.ShouldBindQuery(&req); err != nil {
 		c.JSON(http.StatusBadRequest, errorResponse(http.StatusBadRequest, err))
 		return