I use below code to sendAdminEmail of `Dedicated/VPS Server Welcome Email` .

[malin]

 $client_id = $mergefields['client_id'];
    $service_id = $mergefields['service_id'];
    $service_product_name = $mergefields['service_product'];

    $service_obj = Capsule::select("
        SELECT * FROM tblhosting WHERE id = $service_id
    ");

    $client_obj = Capsule::select("
        SELECT * FROM tblclients WHERE id = $client_id
    ");


    if(count($client_obj) == 0) {
        echo gen_return_json(400, array(
            "msg" => 'there is no this client'
        ));
        return;
    }

    if(count($service_obj) == 0) {
        echo gen_return_json(400, array(
            "msg" => 'there is no this service'
        ));
        return;
    }


//    echo gen_return_json(
//        200,
//        array(
//            ' $messagename' =>  $messagename
//        )
//    );
//    return;


    $command = 'SendAdminEmail';
    $postData = array(
        'messagename' => 'Dedicated/VPS Server Welcome Email',//$messagename, 
        'mergefields' => array(
            'client_id' => 3,//$client_obj[0] -> id,
            'client_name' => $service_obj[0] -> firstname . $service_obj[0] -> lastname ,
            'service_product_name' => $service_product_name,
            'service_domain' => $service_obj[0] -> domain,
            'service_dedicated_ip' =>  $service_obj[0] -> dedicatedip,
            'service_assigned_ips' =>  $service_obj[0] -> assignedips,
            'service_password' => decrypt($service_obj[0] -> password),
            'service_ns1' => $service_obj[0] -> service_ns1,
            'service_ns2' => $service_obj[0] -> service_ns2
        ),
    );
    $adminUsername = 'admin123'; // Optional for WHMCS 7.2 and later

    $results = localAPI($command, $postData, $adminUsername);

    echo gen_return_json(
        200,
        array(
            'sendemail_response' => $results
        )
    );
    return;

 

But however, I get `Email Template not found` error:  

```

{"sendemail_response":{"result":"error","message":"Email Template not found"}}}

```

I promise there exists this email template: