smtp

  package main
 
  import (
    "log"
    "net/smtp"
  )
 
  var (
    from = "test@immwind.com"
    // To From Subject 非必须
    msg = []byte("To:hi@example.com\r\n" +
        "From: test@example.com\r\n" +
        "Subject: Hello World\r\n" +
        "\r\n" +
        "这是测试邮件\n\r")
    recipients = []string{"hi@immwind.com"}
  )
 
  func main() {
    hostname := "smtp.exmail.qq.com"
    auth := smtp.PlainAuth("", "test@example.com", "password", hostname)
 
    err := smtp.SendMail(hostname+":25", auth, from, recipients, msg)
    if err != nil {
        log.Fatal(err)
    }
  }