I want to send an email via my localhost PHP after a specific action is completed.
In the given code, I am testing emails statically to check if it works.
I tried this code:

<?php

require_once "../../../vendor/autoload.php";

use MailjetResources;
//passed in my actual api keys
    $mj = new MailjetClient('api_key','secret_key',false,['version' => 'v3.1']);
    $body = [
        'Messages' => [
        [
            'From' => [
            'Email' => "[email protected]",
            'Name' => "name"
            ],
            'To' => [
            [
                'Email' => "[email protected]",
                'Name' => "name"
            ]
            ],
        'Subject' => "Hello from Mailjet",
        'TextPart' => "Greetings from Mailjet!",
        ]
        ]
    ];

try {

    if( $mj->post(Resources::$Email, ['body' => $body])){
        echo "Email sent successfully!";
    }else{
        echo "Email doesnt sent!";

    }
    
} catch (Exception $e) {
    echo 'Caught exception: '. $e->getMessage() ."n";
}


?>

It’s returning : Email sent successfully!
but, in reality, nothing has been sent.