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File: //var/www/html/email/index.php
<?php
//Import PHPMailer classes into the global namespace
//These must be at the top of your script, not inside a function
use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\SMTP;
use PHPMailer\PHPMailer\Exception;

//Load Composer's autoloader
require 'vendor/autoload.php';

//Create an instance; passing `true` enables exceptions
$mail = new PHPMailer(true);

try {
    //Server settings
   
    //$mail->SMTPDebug = SMTP::DEBUG_SERVER;                      //Enable verbose debug output
    $mail->SMTPDebug = 2;
    $mail->isSMTP();                                            //Send using SMTP
    $mail->Host       = 'smtp.mailgun.org';                     //Set the SMTP server to send through
    $mail->SMTPAuth   = true;                                   //Enable SMTP authentication
    $mail->Username   = 'support@fieldblaze.com';                     //SMTP username
    $mail->Password   = 'ccc!nfotech@1234';                               //SMTP password
   // $mail->SMTPSecure = PHPMailer::ENCRYPTION_SMTPS;            //Enable implicit TLS encryption
    $mail->SMTPSecure = 'tls';
    $mail->Port       = 587;                                     //TCP port to connect to; use 587 if you have set `SMTPSecure = PHPMailer::ENCRYPTION_STARTTLS`

    //Recipients
    $mail->setFrom('info@sotbella.com', 'sotbella');
    $mail->addAddress('rohit@cccinfotech.com', 'Rohit');     //Add a recipient

    $mail->addAddress('naeem@cccinfotech.com', 'Naeem'); 
     
   

    //Content
    $mail->isHTML(true);                                  //Set email format to HTML
    $mail->Subject = 'Info Code';
    $mail->Body    = 'Thank you so much <b>Sir</b>';
    //$mail->AltBody = 'This is the body in plain text for non-HTML mail clients';

    $mail->send();
    echo 'Message has been sent';
} catch (Exception $e) {
    echo "Message could not be sent. Mailer Error: {$mail->ErrorInfo}";
}