TCPclient connect with authentication to SMTP server

Troubleshooting
2

The 10 second delay is going to be a problem for you… it blocks the background tasks on the Spark Core and it will disconnect from the cloud…

Try creating a state machine that runs you through each step, but then drops out to continue through the main loop() once, then onto the next task. :smile:

int sendMail = false;
int sendMailState = 0;
int wait1 = 2000;
int wait2 = 2000; // play with these delays

setup() {
  // setup your outputs...
}

loop() {

  if (buttonState2 == HIGH && sendMail == false) { 
    digitalWrite(ledready, LOW);
    digitalWrite(beep1, HIGH);
    delay(200);
    digitalWrite(beep1, LOW);
    sendMail = true;
    sendMailState = 0;
  }

  if( sendMail == true ) {
    switch( sendMailState++ ) {
      case 0:
        client.connect(server, 25);
        delay(wait1);
        break;
      case 1:
        client.println("auth login");
        delay(wait2);
        break;
      case 2:
        client.println("dmx2cWFtb2c=");
        delay(wait2);
        break;
      case 4:
        client.println("passwordchangedforobviousreason");
        delay(wait2);
        break;
      case 5:
        client.println("mail from: john@doe.com");
        delay(wait2);
        break;
      case 6:
        client.println("rcpt to: you@you.com");
        delay(wait2);
        break;
      case 7:
        client.println("data");
        client.println("This is line 1");
        client.println("This is line 2");
        client.println(".");
        client.flush();
        delay(wait);
        break;
      case 8:
        digitalWrite(beep1, HIGH);
        delay(200);
        digitalWrite(beep1, LOW);
        delay(50);
        digitalWrite(beep1, HIGH);
        delay(200);
        digitalWrite(beep1, LOW);
        sendMail = false;
        break;
      default:
        sendMail = false;
        break;      
    } // end switch
  } // end send mail
} // end loop()
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