# Does Jenkins 2.4.414.2 supports TLS over port 25?

**URL:** <https://community.jenkins.io/t/does-jenkins-2-4-414-2-supports-tls-over-port-25/18774>\
**Category:** Community\
**Created:** [August 28, 2024, 4:15pm UTC](https://community.jenkins.io/t/does-jenkins-2-4-414-2-supports-tls-over-port-25/18774 "2024-08-28T16:15:48Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Dhanasekhar](https://avatars.discourse-cdn.com/v4/letter/d/ec9cab/32.png) [@Dhanasekhar](https://community.jenkins.io/u/Dhanasekhar)\
**Post date:** [August 28, 2024, 4:15pm UTC](https://community.jenkins.io/t/does-jenkins-2-4-414-2-supports-tls-over-port-25/18774/1 "2024-08-28T16:15:48Z")

</div>

We would like to use jenkins(configured on EKS) smtp which is configured over port 25, getting errors while testing.

```auto
javax.net.ssl.SSLException: Unsupported or unrecognized SSL message
	at java.base/sun.security.ssl.SSLSocketInputRecord.handleUnknownRecord(SSLSocketInputRecord.java:457)
	at java.base/sun.security.ssl.SSLSocketInputRecord.decode(SSLSocketInputRecord.java:175)
	at java.base/sun.security.ssl.SSLTransport.decode(SSLTransport.java:111)
	at java.base/sun.security.ssl.SSLSocketImpl.decode(SSLSocketImpl.java:1510)
	at java.base/sun.security.ssl.SSLSocketImpl.readHandshakeRecord(SSLSocketImpl.java:1425)
	at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:455)
	at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:426)
	at org.eclipse.angus.mail.util.SocketFetcher.configureSSLSocket(SocketFetcher.java:662)
	at org.eclipse.angus.mail.util.SocketFetcher.createSocket(SocketFetcher.java:409)
	at org.eclipse.angus.mail.util.SocketFetcher.getSocket(SocketFetcher.java:243)
	at org.eclipse.angus.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:2193)
Caused: jakarta.mail.MessagingException: Could not connect to SMTP host: smtp.kenvue.com, port: 25;
  nested exception is:
	javax.net.ssl.SSLException: Unsupported or unrecognized SSL message

```