Troubleshooting Mail Configuration

For secure mail communication, you can enable authentication, define username and password, and enable SSL or STARTLS in /etc/rhn/rhn.conf:

java.smtp_port = integer (default: 25)
java.smtp_auth = true/false (default: false)
java.smtp_ssl = true/false (default: false)
java.smtp_starttls = true/false (default: false)
java.smtp_user = string (default: null)
java.smtp_pass = string (default: null)

To increase the connection timeout for SMTP server communication, the following parameters can be set in /etc/rhn/rhn.conf:

java.smtp_timeout = integer (default: 5000)
java.smtp_connection_timeout = integer (default: 5000)
java.smtp_write_timeout = integer (default: 5000)