Multiple attachments will be overwritten！

[anbaoyong]

When I send two attachments at the same time, the content of the A attachment will be overwritten by the content of the attachment B, and the content of the attachment B is empty
My code is as follows，i appreciate it.

func SendMail(subject, body string, to []string, file map[string]*os.File) {

user := "[email protected]"
password := "123456"
m := gomail.NewMessage()
m.SetHeaders(map[string][]string{
	"From":    {m.FormatAddress("[email protected]", "test")},
	"To":      to,
	"Subject": {subject},
})
m.SetBody("text/html", body)
for fname, f := range file {
	m.Attach(fname, gomail.SetCopyFunc(func(w io.Writer) error {
		_, err := io.Copy(w, f)
		defer f.Close()
		return err
	}))
}

d := gomail.NewDialer("[email protected]", 587, user, password)
d.TLSConfig = &tls.Config{InsecureSkipVerify: true}
if err := d.DialAndSend(m); err != nil {
	log.Println(err)
}

}

func main() {

filemap := map[string]*os.File{}
f1,_:=os.Open("/control.sh")
f2,_:=os.Open("/build.sh")
filemap["control.sh"]=f1
filemap["build.sh"]=f2
SendMail("subject", "body", []string{"[email protected]"}, filemap)

}

[pedromorgan]

see #104 and #108