fix mail attachment name garbled

[LYY]

Fix #66 , add mail's charset for attachments.

[Tom-Kail]

Thanks for fixing the garbled bug，but I find a way to fix it without changing code

        m := gomail.NewMessage()
    m.SetHeader("From", "big brother <727266990@qq.com>")
    m.SetHeader("To", "1852951552@qq.com")
    //  m.SetAddressHeader("Cc", "dan@example.com", "Dan")
    m.SetHeader("Subject", "请注意")
    m.SetBody("text/html", "明天下午在大会议室见面")
    f, err := os.Create("重要的文件呦.txt")
    if err != nil {
        panic(err)
    }

    defer func(name string) {
        time.Sleep(time.Second * 10)
        os.Remove(name)
    }(f.Name())

    defer f.Close()
    f.WriteString("这是一个不能说的秘密")
    h := make(map[string][]string, 0)
    h["Content-Type"] = []string{`application/octet-stream; charset=utf-8; name="` + f.Name() + `"`} //要设置这个，否则中文会乱码
    //  h["Content-Type"] = []string{`text/plain; name="` + f.Name() + `"`}
    fileSetting := gomail.SetHeader(h)
    m.Attach(f.Name(), fileSetting)
    d := gomail.NewDialer("smtp.example.com", 25, "test@example.com", "password")
    d.TLSConfig = &tls.Config{InsecureSkipVerify: true}
    fmt.Println("================")
    if err := d.DialAndSend(m); err != nil {
        panic(err)
    }
    fmt.Println("结束")

[h3110w0r1d]

it does not work for me

[LYY]

@h3110w0r1d Can you give me some more infomations about your problem?