Aşağıdaki şekilde bir iletişim formum var fakat maillerim iletilmiyor anlamadım yardımcı olabilir misiniz. Şimdiden teşekkür ederim.

<?php
// After form submit checking everything for email sending
if(isset($_POST['form_contact']))
{
    $statement = $pdo->prepare("SELECT * FROM tbl_settings WHERE id=1");
    $statement->execute();
    $result = $statement->fetchAll(PDO::FETCH_ASSOC);                            
    foreach ($result as $row)
    {
        $contact_form_email = $row['contact_form_email'];
        $contact_form_email_subject = $row['contact_form_email_subject'];
        $contact_form_email_thank_you_message = $row['contact_form_email_thank_you_message'];
    }

    $valid = 1;

    if(empty($_POST['visitor_name']))
    {
        $valid = 0;
        $error_message1 .= 'Please enter your name.\n';
    }

    if(empty($_POST['visitor_phone']))
    {
        $valid = 0;
        $error_message1 .= 'Please enter your phone number.\n';
    }


    if(empty($_POST['visitor_email']))
    {
        $valid = 0;
        $error_message1 .= 'Please enter your email address.\n';
    }
    else
    {
        // Email validation check
        if(!filter_var($_POST['visitor_email'], FILTER_VALIDATE_EMAIL))
        {
            $valid = 0;
            $error_message1 .= 'Please enter a valid email address.\n';
        }
    }

    if(empty($_POST['visitor_comment']))
    {
        $valid = 0;
        $error_message1 .= 'Please enter your comment.\n';
    }

    if($valid == 1)
    {
        
        $visitor_name = strip_tags($_POST['visitor_name']);
        $visitor_email = strip_tags($_POST['visitor_email']);
        $visitor_phone = strip_tags($_POST['visitor_phone']);
        $visitor_comment = strip_tags($_POST['visitor_comment']);
 
        $kime = "info@akareyazilim.com";
        $konu = $visitor_name;
        $mesaj = $visitor_comment."<BR>".$visitor_phone;

        mail($kime, $konu, $mesaj);


    }
}
?>