Are you facing the “Jenkins SMTP authentication unsuccessful” issue? Bobcares, as a part of our Server Management Service offers solutions to every Jenkins query that comes our way.

Why Jenkins SMTP Authentication Is Unsuccessful?

When trying to set up Jenkins to send emails using the SMTP, errors or problems are frequently encountered. The accepted protocol for sending emails over the internet is called SMTP.

An “SMTP Authentication Unsuccessful” error will appear if Jenkins is unable to connect to the SMTP server using the provided credentials. Some other reasons for the issue include firewall-network issues, incorrect validation methods, and SMTP server setup mistakes.

Fixing the “Jenkins SMTP authentication unsuccessful” issue

The different ways in which we can fix the issue includes:

1. Firstly, check to see that there is proper login information for the SMTP server.

2. Make sure we’re creating Jenkins’ password the right way if the SMTP server needs 2FA or app-specific logins.

3. Verify that the Jenkins login method complies with the SMTP server’s requirements.

4. Check to see if the Jenkins server has reliable internet access and if any firewall limitations are preventing it from communicating with the SMTP server.

5. Make sure Jenkins’ SMTP server configuration is correct by checking it twice.

6. Make sure to enable the relevant encryption settings in Jenkins if the SMTP server employs STARTTLS or SSL/TLS.

7. Check the Jenkins logs for any error messages or other details that can help us locate the problem.

[Searching for a solution to a different question? We are just a click away.]

Conclusion

We should be able to fix the “Jenkins SMTP Authentication Unsuccessful” error and correctly set up email notifications or other email-related features in Jenkins by taking care of these possible causes provided by our Experts and checking the configuration settings.