diff --git a/server/backtask/mt/Mail.go b/server/backtask/mt/Mail.go
index 0af6ab68..712ec885 100644
--- a/server/backtask/mt/Mail.go
+++ b/server/backtask/mt/Mail.go
@@ -4,6 +4,7 @@ import (
 	"q5"
 	"main/constant"
 	"fmt"
+	"strings"
 )
 
 type Mail struct {
@@ -19,6 +20,14 @@ func (this *Mail) GetContent() string {
 	return this.content
 }
 
+func (this *Mail) ReplaceContent(kv map[string]string) string {
+	result := this.content
+	for k, v := range kv {
+		result = strings.ReplaceAll(result, k, v)
+	}
+	return result
+}
+
 type MailTable struct {
 	nameHash *q5.ConcurrentMap[string, *Mail]
 }
diff --git a/server/backtask/task/spec_transfer721/hero.go b/server/backtask/task/spec_transfer721/hero.go
index f59742ab..96cf2e55 100644
--- a/server/backtask/task/spec_transfer721/hero.go
+++ b/server/backtask/task/spec_transfer721/hero.go
@@ -68,10 +68,6 @@ func (this* hero) internalSendMail(dbIdx int64, accountAddress string, mailName
 	return true
 }
 
-func (this *hero) t(content string) string {
-	return ""
-}
-
 func (this *hero) getMailConfig(mailName string) *jccommon.MailConfig {
 	if v, ok := this.mailCfgHash.Load(mailName); ok {
 		return *v