Php mailler yaptim formu mail atmiyor yardimci olabilecek varmi

<?php

    $mail = $_POST['email'];

    $to = "aaaaaa@gmail.com";/* YOUR EMAIL HERE */
    $subject = "Job application from Potenza";
    $headers = "From: İş başvurusu";

    $message  = "PRESENTATION\n";
    $message .= "\nFirst and Last Name: " . $_POST['name'];
    $message .= "\nEmail: " . $_POST['email'];
    $message .= "\nTelephone: " . $_POST['phone'];
    $message .= "\nGender: " . $_POST['gender'];                
    
    /* FILE UPLOAD */
    if(isset($_FILES['fileupload'])){
    $errors= array();
    $file_name = $_FILES['fileupload']['name'];
    $file_size =$_FILES['fileupload']['size'];
    $file_tmp =$_FILES['fileupload']['tmp_name'];
    $file_type=$_FILES['fileupload']['type'];
    $file_ext=strtolower(end(explode('.',$_FILES['fileupload']['name'])));

    $expensions= array("pdf","doc","docx");// Define with files are accepted
                              
    $OriginalFilename = $FinalFilename = preg_replace('`[^a-z0-9-_.]`i','',$_FILES['fileupload']['name']); 
    $FileCounter = 1; 
    while (file_exists( 'upload_files/'.$FinalFilename )) // The folder where the files will be stored; set the permission folder to  0755. 
           $FinalFilename = $FileCounter++.'_'.$OriginalFilename; 

        if(in_array($file_ext,$expensions)=== false){
            $errors[]="Extension not allowed, please choose a .pdf, .doc, .docx file.";
        }
        // Set the files size limit. Use this tool to convert the file size param https://www.thecalculator.co/others/File-Size-Converter-69.html
        if($file_size > 953600){
            $errors[]='File size must be max 150Kb';
        }
        if(empty($errors)==true){
            move_uploaded_file($file_tmp,"upload_files/".$FinalFilename);
            $message .= "\nResume: http://www.yourdomain.com/upload_files/".$FinalFilename; // Write here the path of your upload_files folder
        }else{
            $message .= "\nFile name: no files uploaded";
            }
        };
        /* end FILE UPLOAD */

        $message .= "\n\nWORK AVAILABILITY";
        $message .= "\nAre you available for work: " . $_POST['availability'];

        if (isset($_POST['minimum_salary_full_time']) && $_POST['minimum_salary_full_time'] != "")
            {
                $message .= "\nMinimum salary: " . $_POST['minimum_salary_full_time'];
                $message .= "\nHow soon would you be looking to start? " . $_POST['start_availability_full_time'];
                $message .= "\nAre you willing to work remotely? " . $_POST['remotely_full_time'];
            }
        if (isset($_POST['minimum_salary_part_time']) && $_POST['minimum_salary_part_time'] != "")
            {
                $message .= "\nMinimum salary: " . $_POST['minimum_salary_part_time'];
                $message .= "\nHow soon would you be looking to start? " . $_POST['start_availability_part_time'];
                $message .= "\nWhen you prefer to work? " . $_POST['day_preference_part_time'];
            }
        if (isset($_POST['fixed_rate_contract']) && $_POST['fixed_rate_contract'] != "")
            {
                $message .= "\nMinimum fixed rate: " . $_POST['fixed_rate_contract'];
                $message .= "\nMinimum hourly rate: " . $_POST['hourly_rate_contract'];
                $message .= "\nMinimum hours for a contract: " . $_POST['minimum_hours_conctract'];
                $message .= "\nAre you willing to work remotely? " . $_POST['remotely_contract'];
            }
                        
        $message .= "\n\nTerms and conditions accepted: " . $_POST['terms'];
                                                
        //Receive Variable
        $sentOk = mail($to,$subject,$message,$headers);
                        
        //Confirmation page
        $user = "$mail";
        $usersubject = "Thank You";
        $userheaders = "From: Job application from Potenza <noreply@yourdomain.com>";
        /*$usermessage = "Thank you for your time. Your quotation request is successfully submitted.\n"; WITHOUT SUMMARY*/
                        
        //Confirmation page WITH  SUMMARY
        $usermessage = "Thank you for your time. Your application is successfully submitted. We will reply shortly.\n\nBELOW A SUMMARY\n\n$message"; 
        mail($user,$usersubject,$usermessage,$userheaders);
    
?>