Error sending message via Roundcube+hmailserver?

Question

Mail server

When sending a message to Roundcube, the following error occurs.
Diagnostics in hmailAdministrator
Test: Collect server details
hMailServer version: hMailServer 5.6.5-B2367
Database type: MySQL
Test: Test IPv6
IPv6 support is available in operating system.
Test: Test outbound port
SMTP relayer not in use. Attempting mail.hmailserver.com:25...
Trying to connect to host mail.hmailserver.com...
Trying to connect to TCP/IP address 5.189.183.138 on port 25.
Received: 220 mail.hmailserver.com ESMTP.
Connected successfully.
Test: Test backup directory
Backup directory C:\MailBackup is writable.
Test: Test MX records
Trying to resolve MX records for energonazorat.uz...
Host name found: mail.energonazorat.uz
Test: Test local connect
Connecting to TCP/IP address in MX records for local domain domain energonazorat.uz...
Trying to connect to host mail.energonazorat.uz...
Trying to connect to TCP/IP address ::1 on port 25.
Trying to connect to TCP/IP address 192.168.0.205 on port 25.
Received: 220 mail.energonazorat.uz ESMTP.
Connected successfully.
Test: Test message file locations
Relative message paths are stored in the database for all messages.
Test: Test IP range configuration
No problems were found in the IP range configuration.