STMP error always timeout

system · August 28, 2013, 6:07pm

code below

i got a problem, it always timeout when i'm trying to send HELO to the SMTP server. i don't know why. Can someone help me plzz.

this is what i got want i run this code

Ready. Press 'e' to send.
connected

Timeout
Email failed

/*
   Email client sketch for IDE v1.0.1 and w5100/w5200
   Posted December 2012 by SurferTim
*/

#include <SPI.h>
#include <Ethernet.h>

// this must be unique
byte mac[] = { 0x90, 0xA2, 0xDA, 0x00, 0x59, 0x67 };  
// change network settings to yours
IPAddress ip( x, x, x, x );    
IPAddress gateway( 0, 0, 0, 0 );
IPAddress subnet( 255, 255, 255, 0 );

// change server to your email server ip or domain
char server[] = "smtpcorp.com";

EthernetClient client;

void setup()
{
  Serial.begin(9600);
  pinMode(4,OUTPUT);
  digitalWrite(4,HIGH);
  Ethernet.begin(mac, ip, gateway, subnet);
  delay(2000);
  Serial.println(F("Ready. Press 'e' to send."));
}

void loop()
{
  byte inChar;

  inChar = Serial.read();

  if(inChar == 'e')
  {
      if(sendEmail()) Serial.println(F("Email sent"));
      else Serial.println(F("Email failed"));
  }
}

byte sendEmail()
{
  byte thisByte = 0;
  byte respCode;

  if(client.connect(server,25)) {
    Serial.println(F("connected"));
  } else {
    Serial.println(F("connection failed"));
    return 0;
  }

  if(!eRcv()) return 0;
  Serial.println(F("Sending helo"));

// change to your public ip
  client.println(F("EHLO 1.2.3.4"));

  if(!eRcv()) return 0;
  Serial.println(F("Sending From"));

// change to your email address (sender)
  client.println(F("MAIL From: <yo@hotmail.com>"));

  if(!eRcv()) return 0;

// change to recipient address
  Serial.println(F("Sending To"));
  client.println(F("RCPT To: <yo@hotmail.com>"));

  if(!eRcv()) return 0;

  Serial.println(F("Sending DATA"));
  client.println(F("DATA"));

  if(!eRcv()) return 0;

  Serial.println(F("Sending email"));

// change to recipient address
  client.println(F("To: You <you@yourdomain.com>"));

// change to your address
  client.println(F("From: Me <me@mydomain.com>"));

  client.println(F("Subject: Arduino email test\r\n"));

  client.println(F("This is from my Arduino!"));

  client.println(F("."));

  if(!eRcv()) return 0;

  Serial.println(F("Sending QUIT"));
  client.println(F("QUIT"));

  if(!eRcv()) return 0;

  client.stop();

  Serial.println(F("disconnected"));

  return 1;
}

byte eRcv()
{
  byte respCode;
  byte thisByte;
  int loopCount = 0;

  while(!client.available()) {
    delay(1);
    loopCount++;

    // if nothing received for 10 seconds, timeout
    if(loopCount > 10000) {
      client.stop();
      Serial.println(F("\r\nTimeout"));
      return 0;
    }
  }

  respCode = client.peek();

  while(client.available())
  {  
    thisByte = client.read();    
    Serial.write(thisByte);
  }

  if(respCode >= '4')
  {
    efail();
    return 0;  
  }

  return 1;
}


void efail()
{
  byte thisByte = 0;
  int loopCount = 0;

  client.println(F("QUIT"));

  while(!client.available()) {
    delay(1);
    loopCount++;

    // if nothing received for 10 seconds, timeout
    if(loopCount > 10000) {
      client.stop();
      Serial.println(F("\r\nTimeout"));
      return;
    }
  }

  while(client.available())
  {  
    thisByte = client.read();    
    Serial.write(thisByte);
  }

  client.stop();

  Serial.println(F("disconnected"));
}

i got the code from Arduino Playground - Email

SurferTim · August 28, 2013, 8:56pm

Only the ~~gateway~~ subnet looks correct. If the ip is not public, don't obfuscate it.

IPAddress ip( x, x, x, x );    
IPAddress gateway( 0, 0, 0, 0 );
IPAddress subnet( 255, 255, 255, 0 );

// change this
  Ethernet.begin(mac, ip, gateway, subnet);
// to this
  Ethernet.begin(mac, ip, gateway, gateway, subnet);

And even after correcting that, this smtpcorp.com server will probably not accept mail for hotmail.com addresses.

char server[] = "smtpcorp.com";

  client.println(F("RCPT To: <yo@hotmail.com>"));

system · August 28, 2013, 9:07pm

And even after correcting that, this smtpcorp.com server will probably not accept mail for hotmail.com addresses.
Code:

char server[] = "smtpcorp.com";

client.println(F("RCPT To: yo@hotmail.com"));

this hotmail is the address that i take to make my account on smtp2go so i think this should be alright.

nly the gateway looks correct. If the ip is not public, don't obfuscate it.
Code:

IPAddress ip( x, x, x, x );
IPAddress gateway( 0, 0, 0, 0 );
IPAddress subnet( 255, 255, 255, 0 );

Code:

// change this
Ethernet.begin(mac, ip, gateway, subnet);
// to this
Ethernet.begin(mac, ip, gateway, gateway, subnet);

sorry i forget that this ip wasn't my public ip.
thx i forget the second gateways but i still don't work. I like i don't receive anything from the server before my HELO.

SurferTim · August 28, 2013, 9:13pm

I don't use smtp2go.com so someone else may need to help you with that.

For hotmail accounts, these are the current email servers:
mx1.hotmail.com
mx2.hotmail.com
mx3.hotmail.com
mx4.hotmail.com

edit: I have tested yahoo and gmail. Both work. I do not have a hotmail account to test for you.

system · August 28, 2013, 11:29pm

edit: I have tested yahoo and gmail. Both work. I do not have a hotmail account to test for you.

what's your code with gmail account ?

SurferTim · August 29, 2013, 2:45am

The same code in the link you provided in the original post, changing only what was specified on that page.
http://playground.arduino.cc/Code/Email
Here is a link to the yahoo email test serial output:
http://forum.arduino.cc/index.php?topic=177603.msg1343356#msg1343356
The gmail send was the same, except I used gmail-smtp-in.l.google.com as the server and my gmail address as the recipient.

system · August 29, 2013, 11:56am

Thanks for the email sketch SurferTim, I didn't know it was on the Playground.

I have already a working webpage. So my DHCP and gateway are already working.
I also update to ThingSpeak.com so I had already a 'client' class declared. I used the same 'client' class and added the part that sends the email. The SMTP server I used is the one supplied by my internet provider, which has no passord or encryption, they only check the IP to see if I am one of their clients. It worked right the first time. Thanks!
My webpage on the Arduino has a button and a form, which I use now to send an email.

system · August 29, 2013, 5:10pm

i always got timeout again, i don't receive come back from the server

/*
   Email client sketch for IDE v1.0.1 and w5100/w5200
   Posted December 2012 by SurferTim
*/

#include <SPI.h>
#include <Ethernet.h>

// this must be unique
byte mac[] = { 0x90, 0xA2, 0xDA, 0x00, 0x59, 0x67 };  
// change network settings to yours
IPAddress ip( 192, 168, 0, 109 );    
IPAddress gateway( 0, 0, 0, 0 );
IPAddress subnet( 255, 255, 255, 0 );

// change server to your email server ip or domain
// IPAddress server( 1, 2, 3, 4 );
char server[] = "gmail-smtp-in.l.google.com";

EthernetClient client;

void setup()
{
  Serial.begin(9600);
  pinMode(4,OUTPUT);
  digitalWrite(4,HIGH);
  Ethernet.begin(mac, ip, gateway, gateway, subnet);
  delay(2000);
  Serial.println(F("Ready. Press 'e' to send."));
}

void loop()
{
  byte inChar;

  inChar = Serial.read();

  if(inChar == 'e')
  {
      if(sendEmail()) Serial.println(F("Email sent"));
      else Serial.println(F("Email failed"));
  }
}

byte sendEmail()
{
  byte thisByte = 0;
  byte respCode;

  if(client.connect(server,25)) {
    Serial.println(F("connected"));
  } else {
    Serial.println(F("connection failed"));
    return 0;
  }
 
  if(!eRcv()) return 0;                                                  ////  it fail here
  Serial.println(F("Sending helo"));

// change to your public ip
  client.println(F("helo 1.2.3.4"));

  if(!eRcv()) return 0;
  Serial.println(F("Sending From"));

// change to your email address (sender)
  client.println(F("MAIL From: <letnic2@hotmail.com>"));

  if(!eRcv()) return 0;

// change to recipient address
  Serial.println(F("Sending To"));
  client.println(F("RCPT To: <letnic2@hotmail.com>"));

  if(!eRcv()) return 0;

  Serial.println(F("Sending DATA"));
  client.println(F("DATA"));

  if(!eRcv()) return 0;

  Serial.println(F("Sending email"));

// change to recipient address
  client.println(F("To: You <you@yourdomain.com>"));

// change to your address
  client.println(F("From: Me <me@mydomain.com>"));

  client.println(F("Subject: Arduino email test\r\n"));

  client.println(F("This is from my Arduino!"));

  client.println(F("."));

  if(!eRcv()) return 0;

  Serial.println(F("Sending QUIT"));
  client.println(F("QUIT"));

  if(!eRcv()) return 0;

  client.stop();

  Serial.println(F("disconnected"));

  return 1;
}

byte eRcv()
{
  byte respCode;
  byte thisByte;
  int loopCount = 0;

  while(!client.available()) {
    delay(1);
    loopCount++;

    // if nothing received for 10 seconds, timeout
    if(loopCount > 10000) {
      client.stop();
      Serial.println(F("\r\nTimeout"));
      return 0;
    }
  }

  respCode = client.peek();

  while(client.available())
  {  
    thisByte = client.read();    
    Serial.write(thisByte);
  }

  if(respCode >= '4')
  {
    efail();
    return 0;  
  }

  return 1;
}


void efail()
{
  byte thisByte = 0;
  int loopCount = 0;

  client.println(F("QUIT"));

  while(!client.available()) {
    delay(1);
    loopCount++;

    // if nothing received for 10 seconds, timeout
    if(loopCount > 10000) {
      client.stop();
      Serial.println(F("\r\nTimeout"));
      return;
    }
  }

  while(client.available())
  {  
    thisByte = client.read();    
    Serial.write(thisByte);
  }

  client.stop();

  Serial.println(F("disconnected"));
}

system · August 29, 2013, 6:14pm

The email sketch by SurferTim is for advanced users. You have to know a little about the protocol.

This line: client.println(F("helo 1.2.3.4"));
requires you IP number on the internet.
You can request it here: http://whatismyipaddress.com/

SurferTim, is it possible to do that automatically ? My IP sometimes changes (once a year). How does a normal email client do that ?

system · August 29, 2013, 6:19pm

but i never got to this line it fail before that line, and i change it in my sketch but not on the forum.

system · August 29, 2013, 6:33pm

Is the SMTP connection failing ?
This line ? if(client.connect(server,25)

Or is the complete ethernet connection failing ?
This line ? Ethernet.begin(...

Could you try the webserver with DHCP sketch.
To see if you can create a webpage and connect to it with a browser.

That example is old, please use DHCP by omitting the 'ip' parameter and use Ethernet.begin( mac);
Tell us what the output of the serial monitor is.

system · August 29, 2013, 6:43pm

this is what i got

server is at 192.168.0.111
new client
GET / HTTP/1.1
Host: 192.168.0.111
User-Agent: Mozilla/5.0 (Windows NT 6.2; WOW64; rv:23.0) Gecko/20100101 Firefox/23.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: fr,fr-fr;q=0.8,en-us;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate
Connection: keep-alive

and on the web page

analog input 0 is 1023
analog input 1 is 1023
analog input 2 is 681
analog input 3 is 512
analog input 4 is 468
analog input 5 is 399

system · August 29, 2013, 6:55pm

Very nice. The hardware and your router are okay.

The webserver example uses a different mac.
Your router assigns '111' to you with DHCP, while you sketch uses 109.

Could you try to slowly merge the sketches ?
Try your mac from the email sketch in the Webserver sketch.

After that, try to setup a DHCP connection in the email sketch.

If that is all okay, the SMTP server is not right.
Or is that what you already know ?
Could you try another SMTP server ?
I have hotmail and gmail, tell me if you want me to try something.

system · August 29, 2013, 7:09pm

when i put a dhcp connection like in the code, it fail at client.connect(server,25)

i want to send an e-mail to any account, i got gmail and hotmail account.

code with dhcp connection

byte mac[] = { 0x90, 0xA2, 0xDA, 0x00, 0x59, 0x67 };  
// change network settings to yours
IPAddress ip( 192, 168, 0, 110 );    
IPAddress gateway( 0, 0, 0, 0 );
IPAddress subnet( 255, 255, 255, 0 );

// change server to your email server ip or domain
char server[] = "gmail-smtp-in.l.google.com";

EthernetClient client;

void setup()
{
  Serial.begin(9600);
  pinMode(4,OUTPUT);
  digitalWrite(4,HIGH);
  Ethernet.begin(mac);
  delay(2000);
  Serial.println(F("Ready. Press 'e' to send."));
}

void loop()
{
  byte inChar;

  inChar = Serial.read();

  if(inChar == 'e')
  {
      if(sendEmail()) Serial.println(F("Email sent"));
      else Serial.println(F("Email failed"));
  }
}

byte sendEmail()
{
  byte thisByte = 0;
  byte respCode;

  if(client.connect(server,25)) {
    Serial.println(F("connected"));
  } else {
    Serial.println(F("connection failed"));
    return 0;
  }
 
  if(!eRcv()) return 0;
  Serial.println(F("Sending helo"));

// change to your public ip
  client.println(F("helo 1.2.3.4"));

SurferTim · August 29, 2013, 10:41pm

Are you sure your dns is working? Try sending by ip. This is the ip for gmail-smtp-in.l.google.com.

IPAddress server(173,194,64,26);

edit: Some of these servers are dependent on your location. You should do a nslookup for your local servers. From a command prompt

nslookup
set query=mx
gmail.com

system · August 29, 2013, 11:48pm

I can connect to that server, using: telnet gmail-smtp-in.l.google.com 25
So I don't know what is going on.

system · August 30, 2013, 1:33am

with the ip address i'm still stuck at client.connect(server,25); then after connection failed and email failed

i got mx preference 5 for gmail-smtp-in.l.google.com and others are 10, 20, 30 and 40.

my goal with this project is send an e-mail to my cellphone at xxxxxxxx@msg.telus.com. So do we got a better way ?

SurferTim · August 30, 2013, 3:21am

It may be you are being blocked from sending email that way by your ISP, possibly as spam prevention. I can't explain why you cannot make a connection. If you were being blocked by the email server, it would allow you to make the connection, but would refuse the email later in that code.

I recommend contacting your ISP and ask about it. Explain what you are trying to do. Maybe you can use their email server as a relay.

system · August 30, 2013, 8:09am

It is also very hard to understand what is going on, without the real numbers and real output.

I run Ubuntu linux, and use telnet.
For example this (I typed the bold text, the 'myip' is my ip number on the internet):

telnet smtp.gmail.com 25
Trying 173.194.65.108...
Connected to gmail-smtp-msa.l.google.com.
Escape character is '^]'.
220 mx.google.com ESMTP p5sm236964eg.5 - gsmtp
EHLO 'myip'
250-mx.google.com at your service, ['myip']
250-SIZE 35882577
250-8BITMIME
250-STARTTLS
250 ENHANCEDSTATUSCODES
QUIT
Connection closed by foreign host.

system · August 30, 2013, 6:47pm

This is what i always got.

Ready. Press 'e' to send.
connection failed
Email failed

I'm not able to connect to the server.

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