使用mailhog和golang发送邮件时未加密的连接

unencrypted connection

package main
import (
    "crypto/tls"
    "fmt"
    "net/smtp"

    "github.com/jordan-wright/email"
    "github.com/stretchr/testify/assert"
)

func TestSendMail(t *testing.T) {
  m := struct{
    Host string
    Port int
    User string
    Pass string 
  }{
    Host: `local.test`, // resolved to 127.0.0.1 in /etc/hosts
    Port: 1025,
    User: `test@local.test`,
    Pass: `test`,
  }
  e := email.NewEmail()
  e.From = `test@local.test`
  e.To = []string{`test@local.test`}
  e.Subject = `test mail`
  host, _ := os.Hostname()
  e.Text = []byte(`testing email from ` + host)
  err := e.SendWithStartTLS(fmt.Sprintf("%s:%d", m.Host, m.Port), smtp.PlainAuth("", m.User, m.Pass, m.Host), &tls.Config{InsecureSkipVerify: true})
  assert.NoError(t, err)
}

docker-compose.yml

version: "3.9"
services:
  mailhog:
    image: mailhog/mailhog
    container_name: test_mailhog
    env_file:
      - backend/.env # not used
    ports:
      - 1025:1025 # smtp server
      - 8025:8025 # web ui
    restart: unless-stopped

或者有什么解决办法？例如，docker-compose上的某个TLS代理？