hello, sorry for the delay, finally I found the answer:
$config['email']['enable'] = TRUE;
$config['email']['from'] = "'Alias Mail' <sender_email@acde.com>";
$config['email']['default'] = "receiver_email@"xyzw.com;
$config['email']['default_only'] = TRUE;
$config['email']['backend'] = 'smtp';
$config['email']['sendmail_path'] = '/etc/postfix'; // The location of the sendmail program.
$config['email']['smtp_host'] = 'xxxxxx'; // Outgoing SMTP server name.
$config['email']['smtp_port'] = xxxxxx; // The port to connect.
$config['email']['smtp_timeout'] = 10; // SMTP connection timeout in seconds.
$config['email']['smtp_secure'] = "xxxxxxxx"; // Enable encryption. Use 'tls' or 'ssl' or 'starttls'
$config['email']['smtp_auth'] = TRUE; // Whether or not to use SMTP authentication.
$config['email']['smtp_username'] = "sender_email@acde.com"; // SMTP username.
$config['email']['smtp_password'] = "sender_email_password_here"; // Password for SMTP authentication.
Please, close the ticket. Thank you.