func runserver(t *testing.T, server *smtpd.Server) (addr string, closer func()) {
ln, err := net.Listen("tcp", "127.0.0.1:0")
if err != nil {
t.Fatalf("Listen failed: %v", err)
}
go func() {
server.Serve(ln)
}()
done := make(chan bool)
go func() {
<-done
ln.Close()
}()
return ln.Addr().String(), func() {
done <- true
}
}
func runsslserver(t *testing.T, server *smtpd.Server) (addr string, closer func()) {
cert, err := tls.X509KeyPair(localhostCert, localhostKey)
if err != nil {
t.Fatalf("Cert load failed: %v", err)
}
server.TLSConfig = &tls.Config{
Certificates: []tls.Certificate{cert},
}
return runserver(t, server)
}
func ExampleServer() {
var server *smtpd.Server
// No-op server. Accepts and discards
server = &smtpd.Server{}
server.ListenAndServe("127.0.0.1:10025")
// Relay server. Accepts only from single IP address and forwards using the Gmail smtp
server = &smtpd.Server{
HeloChecker: func(peer smtpd.Peer, name string) error {
if !strings.HasPrefix(peer.Addr.String(), "42.42.42.42:") {
return errors.New("Denied")
}
return nil
},
Handler: func(peer smtpd.Peer, env smtpd.Envelope) error {
return smtp.SendMail(
"smtp.gmail.com:587",
smtp.PlainAuth(
"",
"*****@*****.**",
"password",
"smtp.gmail.com",
),
env.Sender,
env.Recipients,
env.Data,
)
},
}
server.ListenAndServe("127.0.0.1:10025")
}