Jenkins SMTP connection refused. What am I missing? - email

Question

I've got Jenkins ver 1.524 installed on a Windows 7 box and I'm trying to configure email but the "Test configuration" is reporting errors. Jenkins is running as a service under my own domain account.
My settings are as follows:
SMTP server: smtp.corpdomain.com
Default user email suffix: #corpdomain.com
Not using authentication
Not using SSL
SMTP port: 25
Reply-To Address: tools#corpdomain.com
Charset: UTF-8
When I test the configuration, I usually get the following exception:
javax.mail.MessagingException: Could not connect to SMTP host: smtp.amazon.com, port: 25;
nested exception is:
java.net.ConnectException: Connection timed out: connect
Yet every once in a while I receive the following instead:
com.sun.mail.smtp.SMTPSendFailedException: 553 5.1.8 <nobody#nowhere>... Domain of sender address nobody#nowhere does not exist
;
nested exception is:
com.sun.mail.smtp.SMTPSenderFailedException: 553 5.1.8 <nobody#nowhere>... Domain of sender address nobody#nowhere does not exist
However, I am able to send mail from the command line without errors via both python script and java (using javax.mail) without authentication, and I'm able to telnet to the SMTP server on port 25, so I don't see how it could be a firewall issue.
One other note that may be related: When I try to install a plug-in via the Jenkins web interface, I receive a 403 response for the URL "http://updates.jenkins-ci.org/update-center.json?uctest". However, I'm able to connect to that URL from a browser on the same machine.
Could this be a Tomcat configuration issue? I'm not familiar with Tomcat so I'm not sure where to even start looking. Maybe a Jenkins configuration that I've missed? Any other ideas?
Thanks in advance!

Answer 1

FWIW The nobody#nowhere address is the default address Jenkins comes with for the system admin email address (which is used as the from address when sending emails)
you can change it at
Manage Jenkins > Configure System > Jenkins Location

Answer 2

first, use port 465
second, get your email verified in AWS SES, and change your default sending email from here:
Jenkins -> Configure System -> Jenkins Location -> System Admin e-mail address

Answer 3

Still looks to me like your firewall is blocking Jenkins' service from accessing those ports -
especially as the connection times-out, which is typical for such cases.
Suggest you try to disable the firewall completely and see if there is any change.
Cheers

Answer 4

To check for conectivity problems from Jenkins, I would go to the Script Console at Manage Jenkins -> Script Console, and there, try to connect to the port you want to test (25 in your case), with a Groovy script like:
s = new Socket()
s.setSoTimeout(200)
s.connect(new InetSocketAddress("smtp.corpdomain.com", 25), 200)
s.close()
If you don't receive any kind of IOError, then there is no problem with the conectivity.
Note: I could have used simply new Socket("smtp.corpdomain.com", 25) but it will try forever to connect if the Firewall ignores your attempts.
For the SMTPSendFailedException you eventually receive, as #paul-henry mention:
The nobody#nowhere address is the default address Jenkins comes with for the system admin email address (which is used as the from address when sending emails)
you can change it at
Manage Jenkins > Configure System > Jenkins Location
Resources:
Networking with Groovy
Add a timeout when creating a new Socket

Answer 5

Thanks for submitting an edit. It is only visible to you until it’s been approved by trusted community members
first, use port 465 second, get your email verified in AWS SES, and change your default sending email from here: Jenkins -> Configure System -> Jenkins Location -> System Admin e-mail address
Thanks. It helps me!
My problem was "550-Verification failed for "