SignUpAssistant An error occurred while sending an email

[nahmeegaming]

Hi,
I'm using SFS2x 2.13.5 linux on Docker.
I'm working SignUpAssistant, I have set up the server extension and Postgres database already.
The registration is working properly. Create a row on database with all the information and activation code.

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suac.getConfig().emailResponse.isActive = true;
suac.getConfig().emailResponse.fromAddress = "contact@mydomain.com";
suac.getConfig().emailResponse.subject = "Thanks for signing up";
suac.getConfig().emailResponse.template = "AuthEmailTemplates/SignUpConfirmation.html";

But I have problem with SMTP mail server. I got

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WARN  [pool-4-thread-1] signup.SignUpAssistant     - An error occurred while sending an email to: contact@mydomain.com -- javax.mail.MessagingException: Could not connect to SMTP host: smtp.sendgrid.net, port: 25, response: 554

I tried sendgrid and mailgun also got the same error. I tried port 465 I got

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javax.mail.MessagingException: Could not connect to SMTP host: smtp.sendgrid.net, port: 465, response: -1

I tried using the cretencial on this website https://www.smtper.net/, sendgrid smtp server is working and able to send email.

Then I tried installing SFS2X Windows on the machine and using the same config, I also can't connect to the smtp server and got the same error just one more line.

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javax.mail.MessagingException: Could not connect to SMTP host: smtp.sendgrid.net, port: 465;
  nested exception is:
        java.net.ConnectException: Connection refused: connect
       

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javax.mail.MessagingException: Could not connect to SMTP host: smtp.sendgrid.net, port: 25;
  nested exception is:
        java.net.ConnectException: Connection refused: connect
       

I work on it for couple of days already, can you help me guild through the problem?
Thank you very much.

[Lapo]

Hi,
if you are certain that the SMTP server host/port and relative credentials are configured correctly I would recommend checking if you have any firewall rules preventing the connection to the server.

Cheers

[nahmeegaming]

Hi thank you for your response.
The credential are correct. I copied from server.xml to test and it works. I got the email.



Then I turn off the firewall. and allow everything from sfs2x still I got this error.

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Failed sending email: { Email To: hr@mydomain.com, From: contact@mydomain.com, Subject: Thanks for signing up }, javax.mail.MessagingException: Could not connect to SMTP host: smtp.sendgrid.net, port: 25;
  nested exception is:
        java.net.ConnectException: Connection refused: connect

Now I'm stuck.

[Lapo]

Hi,
the message saying that the connection is refused may indicate that the SMTP server has a black-list of IP ranges that are not allowed to connect. Typically these are used defend from known IP ranges used by spammers but sometimes these filters are too coarse and they end up blocking legitimate users.

In any case if you want you can send us the credentials you're using and we can analyze the problem a little bit further.
If you decide to do so, send us an email with the details to our support@... email box, with a reference to this discussion.

Thanks.

[nahmeegaming]

Thanks for your guide, the problem solved.

[nahmeegaming]

Hi
After I set up Digitalocean and send SMTP on port 587. I can send the email. But if I develop on localhost it still error when sending email through port 587. Here is the error.

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javax.mail.MessagingException: Can't send command to SMTP host;
[33msmartfox    | [0m   nested exception is:
[33msmartfox    | [0m javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertP
athBuilderException: unable to find valid certification path to requested target

Can you guide me on how to solve this?

[Lapo]

I've already replied to the same question via email. Let's keep the conversation in one place.
Thanks

[HTCraft]

Can you guide me on how to solve this?

Look at https://www.java-samples.com/showtutorial.php?tutorialid=210