port 587 with ssl ANS TLS not working

[Pim]

Hi Renzo,

 

I tried to setup for my provider. Connection failed. My provider uses port 587 for all encryption types STARTTLS, SSL and TLS.

Any suggestion what I can do to start with TLS as preference?

 

Kind regards,

 

Pim

[Renzo Mischianti]

Hi Pim,
Wich platform do you use??
Bye Renzo

[mjorrens]

I am having the same problem.

I have an “Arduino Uno Wifi Rev2” board.

I am trying to use Gmail but I have also tried Yahoo and Office365.

I have confirmed SMTP works on my laptop by creating a quick program in Visual Studio 2019 (Windows 10). In that test program, I am unable to send emails on port 465 but emails do work on port 587. This is the case with gmail, yahoo and Office365.

I have used the same settings on Arduino but consistently get a “timeout” when trying to send an email. WiFi connects fine.

I did have to change the includes to this for your basic send example:

#include <EMailSender.h>
#include <WiFiNINA.h>
#include <UIPEthernet.h>

My constructor is:

EMailSender emailSend(“[my email]@gmail.com”, “[my password]”, “[my email]@gmail.com”, “[my name]”, “smtp.gmail.com”, 587);

Thanks!

[Renzo Mischianti]

Hi majorrens,
GMail and other services that need TSL can’t work with Arduino UNO or Mega, you must use not encrypted service like sendgrid, refer to the article

Send email with attachments (v2.x library): Arduino Ethernet – 1

Bye Renzo

[mjorrens]

Got it. That is what I suspected. I am also getting an Arduino MKR WiFi 1010. Will that be able to work with gmail?

Thanks!

[Renzo Mischianti]

Hi mjorrens,
Yes, that device is fantastic, I’ve used also esp8266 and esp32, but MKR WiFi 1010 is very powerful.

You can refer this article
Send email with attachments: Arduino SAMD boards (WiFiNINA) – 3

But Arduini UNO work with sendgrid if you need.

Bye Renzo

[mjorrens]

Great! Perhaps remove reference to the Arduino UNO WiFi Rev.2 in that article or add a note that it will not work with gmail.

I will let you know how it goes with the MKR Wifi 1010.

Marc

[Author]

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