5.5.4 Invalid Address

Tagged: Arduino Ethernet

This topic has 5 replies, 2 voices, and was last updated 3 years, 8 months ago by Renzo Mischianti.

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- 14 January 2022 at 15:13 #17915
  scoosys
  Participant
  Hi Renzo!
  
  I have an SMTP Server without SSL / TLS but if I want to send an mail I always get this error.
  
  Im using an MEGA with ENC28J60 Shield.
  
  I used 0 / 0 as login because the Server doesnt need them.
  
  Here is my Code:
```
// Includes
#include <Arduino.h>
#include <EMailSender.h>
#include <IPAddress.h>

// Set Mail Params

EMailSender emailSend("0","0","test@test.com","SmartTest","IP of SMTP",25); // to be defined

//

byte mac[] = { 0xAA, 0xCD, 0xBE, 0xEF, 0xDD };

// the setup function runs once when you press reset or power the board

void setup() 
{
	// INIT
	Serial.begin(115200);

	Ethernet.init(53);
	Ethernet.begin(mac);

	Serial.println("IP: ");
	Serial.println(Ethernet.localIP());

	

	EMailSender::EMailMessage message;
	message.subject = "Test";
	message.message = "Bestanden!";

	EMailSender::Response resp = emailSend.send("smarttest@gmail.com", message);
	
	Serial.println(resp.status);
	Serial.println(resp.code);
	Serial.println(resp.desc);

}

// the loop function runs over and over again until power down or reset
void loop() {
  
}
```
- 14 January 2022 at 18:01 #17918
  Renzo Mischianti
  Keymaster
  Hi scoosys,
  I found this answer to your problem
  
  To fix this you need to add the full domain name or a workgroup name to the network identification.
  
  Open the System Properties and go to the Computer Name tab (Network Identification on Win2000 server). You will see “MACHINE-name.” in the full computer name field. You will need to append your full domain name or workgroup name here. Click the “Change” button (Properties for Win2k) on the Computer Name tab, then click “More”. Enter the full domain name or workgroup name in the “Primary DNS suffix of this computer” and click OK. After you OK the change, you will be required to reboot.
  
  When you come back up, the Network ID page should show the Full machine.domain.com name.
  
  Other causes may be, a failure to assign a valid email address to the mandatory From property:
  Mail.From = “name@domain.com”
  This error may also occur if a name instead of an email address is specified for this property. Another reason is, invalid syntax in an email address passed to any of the methods: AddAddress, AddCC, AddBcc or AddReplyTo.
  
  I think the second part can help you.
  
  I don’t need if necessary for your provider (but I think no) you can set the value to HELO message with emailSend.setPublicIpDescriptor(<Value of HELO>)
  
  If you don’t need authentication you must set It with this command
  
  emailSend.setUseAuth(false);
  
  Bye Renzo
- 15 January 2022 at 11:13 #17927
  scoosys
  Participant
  Hi Renzo, I tried your solution but Im still running in the same error.
  
  What did you mean by that qoute, because my EMailFrom is set to the correct Form:
  
  “mail@domain.com”
  
  I also found out that the Mail Server would not connect me all the time, like half of the time the connection timed out. Could that be a reason I should look at?
  
  Regards
  
  scoo
- 15 January 2022 at 17:12 #17931
  Renzo Mischianti
  Keymaster
  Hi scoo,
  sorry I lost the part of your topic where you write that you use
  
  Im using an MEGA with ENC28J60 Shield.
  
  the Arduino Ethernet not support SSL so you can’t use normal provider. You must use provider like sendgrid.
  For more information about Ethernt and Arduino read the article
  Send email with attachments (v2.x library): Arduino Ethernet – 1
  
  Bye Renzo
- 15 January 2022 at 23:13 #17933
  scoosys
  Participant
  Hi Renzo,
  
  Would it be an option to disable SSL at the SMTP Server?
  
  Thanks for your effort.
  
  Regards
  
  scoo
- 17 January 2022 at 09:26 #17939
  Renzo Mischianti
  Keymaster
  Hi scoosys,
  ahh!! the SSL for Arduino Mega Ethernet was disable by default.
  
  It’s something else needed by the server. You must check documentation of the server.
  Bye Renzo
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