diff --git a/mian.go b/mian.go
index cfd9ae3..cb44f19 100644
--- a/mian.go
+++ b/mian.go
@@ -5,7 +5,6 @@ import (
 	"encoding/json"
 	"flag"
 	"fmt"
-	"io/ioutil"
 	"log"
 	"mime"
 	"net"
@@ -13,6 +12,8 @@ import (
 	"os"
 	"time"
 
+	"io"
+
 	"github.com/jhillyerd/enmime"
 	"github.com/mhale/smtpd"
 )
@@ -67,7 +68,7 @@ func postMailContent(url string, key string, mailContent *MailContent) error {
 	defer resp.Body.Close()
 
 	// 读取响应体（如果需要）
-	body, err := ioutil.ReadAll(resp.Body)
+	body, err := io.ReadAll(io.Reader(resp.Body))
 	if err != nil {
 		return err
 	}
@@ -95,6 +96,9 @@ func mailHandler(origin net.Addr, from string, to []string, data []byte) error {
 	// mediaType, params, err := mime.ParseMediaType(contentType)
 
 	body := env.HTML
+	if len(body) == 0 {
+		body = env.Text
+	}
 
 	fmt.Println("Body:", body)
 
@@ -133,7 +137,7 @@ func main() {
 	}
 	defer file.Close()
 
-	configBytes, err := ioutil.ReadAll(file)
+	configBytes, err := io.ReadAll(io.Reader(file))
 	if err != nil {
 		log.Fatalf("Error reading config file: %v", err)
 	}