Easy-to-use function to send HTML and plain-text emails in Go
func SendMail(addr, from, subject, body string, to []string) error {
r := strings.NewReplacer("\r\n", "", "\r", "", "\n", "", "%0a", "", "%0d", "")
c, err := smtp.Dial(addr)
if err != nil {
return err
}
defer c.Close()
if err = c.Mail(r.Replace(from)); err != nil {
return err
}
for i := range to {
to[i] = r.Replace(to[i])
if err = c.Rcpt(to[i]); err != nil {
return err
}
}
w, err := c.Data()
if err != nil {
return err
}
msg := "To: " + strings.Join(to, ",") + "\r\n" +
"From: " + from + "\r\n" +
"Subject: " + subject + "\r\n" +
"Content-Type: text/html; charset=\"UTF-8\"\r\n" +
"Content-Transfer-Encoding: base64\r\n" +
"\r\n" + base64.StdEncoding.EncodeToString([]byte(body))
_, err = w.Write([]byte(msg))
if err != nil {
return err
}
err = w.Close()
if err != nil {
return err
}
return c.Quit()
}Usage:
SendMail("127.0.0.1:25", (&mail.Address{"from name", "[email protected]"}).String(), "Email Subject", "message body", []string{(&mail.Address{"to name", "[email protected]"}).String()})