smtp.SendMail无法将邮件发送到多个配方golang

Question

I want to send mail to multiple recipients in Go, with my yahoo mail, but I from all recipients only I get mail.

Code:

err := smtp.SendMail(
    "smtp.mail.yahoo.com:25",
    auth,
    "[e-mail]",
    []string{"[e-mail], [e-mail]"},
    []byte("test")

message:

From: "testMail1" <[e-mail]>
To: testMail1 <[e-mail]>, testMail2 <[e-mail]>,
Subject: "mail"
MIME-Version: 1.0
Content-Type: text/html; charset="utf-8"
Content-Transfer-Encoding: base64

This is output:

2015/05/18 20:22:26 501 Syntax error in arguments

What have I done wrong?

Answer 1

Your code snippet is incomplete and does not match your email. Could you send more code?

Anyway you can try replacing:

[]string{"[e-mail], [e-mail]"},

By:

[]string{"[e-mail]", "[e-mail]"},

Also you can try my package Gomail to easily send emails:

package main

import (
    "gopkg.in/gomail.v2"
)

func main() {
    m := gomail.NewMessage()
    m.SetAddressHeader("From", "[e-mail]", "testMail1")
    m.SetHeader("To",
        m.FormatAddress("[e-mail]", "testMail1"),
        m.FormatAddress("[e-mail]", "testMail2"),
    )
    m.SetHeader("Subject", "mail")
    m.SetBody("text/plain", "Hello!")

    d := gomail.NewPlainDialer("smtp.mail.yahoo.com", 25, "login", "password")
    if err := d.DialAndSend(m); err != nil {
        panic(err)
    }
}