Dear Don
Oracle Application Express stores unsent email messages in a table named APEX_MAIL_QUEUE. You can manually deliver mail messages stored in this queue to the specified SMTP gateway by invoking the APEX_MAIL.PUSH_QUEUE procedure.
Oracle Application Express logs successfully submitted message in the table APEX_MAIL_LOG with the timestamp reflecting your server's local time. Keep in mind, the most efficient approach to sending email is to create a background job (using a DBMS_JOB package) to periodically send all mail messages stored in the active mail queue.
Please check the reference
http://docs.oracle.com/cd/E14373_01/apirefs.32/e13369/apex_mail.htm
If this solves your question, please, mark it as correct otherwise as helpful
Regards
Mahmoud
