Specified SMTP Configuration is Ignored and Application Uses localhost and Port 25
Platform Notice: Data Center Only - This article only applies to Atlassian products on the Data Center platform.
Note that this KB was created for the Data Center version of the product. Data Center KBs for non-Data-Center-specific features may also work for Server versions of the product, however they have not been tested. Support for Server* products ended on February 15th 2024. If you are running a Server product, you can visit the Atlassian Server end of support announcement to review your migration options.
*Except Fisheye and Crucible
Symptoms
The Mail Servers page displays correctly user defined SMTP server (different from localhost). The following appears in the atlassian-jira.log:
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com.atlassian.mail.MailException: javax.mail.MessagingException: Could not connect to SMTP host: localhost, port: 25;
nested exception is:
java.net.ConnectException: Connection refused
at com.atlassian.mail.server.impl.SMTPMailServerImpl.send(SMTPMailServerImpl.java:169)
at com.atlassian.jira.web.action.admin.mail.SendTestMail.doExecute(SendTestMail.java:93)
...
Caused by: javax.mail.MessagingException: Could not connect to SMTP host: localhost, port: 25;
nested exception is:
java.net.ConnectException: Connection refused
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1391)
...
Cause
JavaMail library attempts to connect the server specified by user and on failure it defaults to localhost and port 25.
Resolution
Ensure that valid Host Name and protocol parameters are specified in SMTP Mail Server section of Mail Servers page.
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