To enable Oracle Application Express to send mail, an instance administrator must configure instance-level email settings.

• About Enabling Network Services
  To send outbound mail, use Web services, or use PDF/report printing in Oracle Application Express, an Instance administrator must enable network services.
• Configuring Email in a Full Development Environment
  An Instance administrator must configure Oracle Application Express to send mail in a full development environment.
• Configuring Email in a Runtime Environment
  An Instance administrator must configure Oracle Application Express to send mail in a runtime environment.
• Determining Email Settings in a Runtime Environment
  Determine email settings in runtime environment