port 587 with ssl ANS TLS not working

Tagged: SMTP TLS 587

This topic has 6 replies, 3 voices, and was last updated 4 years ago by mjorrens.

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- 12 February 2021 at 15:47 #9986
  Pim
  Participant
  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
- 12 February 2021 at 18:25 #9987
  Renzo Mischianti
  Keymaster
  Hi Pim,
  Wich platform do you use??
  Bye Renzo
- 22 February 2021 at 21:02 #10108
  mjorrens
  Participant
  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!
  - 22 February 2021 at 21:59 #10109
    Renzo Mischianti
    Keymaster
    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
  - 22 February 2021 at 22:15 #10110
    mjorrens
    Participant
    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!
- 22 February 2021 at 22:19 #10111
  Renzo Mischianti
  Keymaster
  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
- 22 February 2021 at 22:42 #10113
  mjorrens
  Participant
  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
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