add simple mailer

mail/mailer.go

@@ -0,0 +1,27 @@
+package mailer
+
+import (
+	"net/smtp"
+)
+
+type Mailer struct {
+	server string
+	port   string
+	auth   smtp.Auth
+	from   string
+}
+
+func NewMailer(server, port, username, password string) Mailer {
+	auth := smtp.PlainAuth("", username, password, server)
+	return Mailer{
+		server: server,
+		port: port,
+		auth: auth,
+		from: username,
+	}
+}
+
+func (m *Mailer) SendMail(to []string, msg string) (err error) {
+	err = smtp.SendMail(m.server+":"+m.port, m.auth, m.from, to, []byte(msg))
+	return
+}