I am using Apex 21.2, on XE 21c database.
I've tried to send email with apex_mail.send procedure.
Mail is in APEX_210200.WWV_FLOW_MAIL_QUEUE table, but after executing apex_mail.push_queue procedure mail is not sent, and there is no error shown.
If I use UTL_SMTP package, I am able to send email. (meaning that ACL and SMTP are configured correctly).
In form "Manage Instance -> Mail Queue" of Apex instance admin I have "Mail Send Count"=0. When I try to Force Send Mail, I receive message : Successfully sent mail., but nothing happens.
Any suggestion is welcome!