by: admin2345Posted on:

Invio di e-mail tramite server SMTP – Soluzioni semplici e avanzate

L’invio di e-mail basato su SMTP può essere implementato in diversi modi, sia con un approccio base che avanzato. Di seguito, presentiamo sia opzioni semplici che più complesse, insieme a un esempio di codice PHP.

    Soluzione semplice: Noleggia un hosting e un dominio

    Il modo più semplice per utilizzare l’invio di e-mail basato su SMTP è noleggiare un hosting e un dominio.
    La maggior parte dei servizi di hosting supporta l’esecuzione di PHP e dispone di un SMTP preconfigurato, consentendo l’invio di e-mail direttamente utilizzando la funzione mail() di PHP, come segue:

    <?php

    function sendEmail($emailAddresses, $subjects, $sentences) {
        foreach ($emailAddresses as $email) {
            // Select a random subject
            $subject = $subjects[array_rand($subjects)];
            
            // Generate the email body
            $message = '';
            foreach ($sentences as $sentenceOptions) {
                $message .= $sentenceOptions[array_rand($sentenceOptions)] . " ";
            }
            
            // Send the email
            $headers = "From: no-reply@domain.com\r\n";
            if (mail($email, $subject, $message, $headers)) {
                echo "Email successfully sent to: $email\n";
            } else {
                echo "Failed to send email to: $email\n";
            }
        }
    }

    // Define email addresses
    $emailAddresses = [
        "example1@domain.com",
        "example2@domain.com",
        "example3@domain.com",
    ];

    // Define possible subjects
    $subjects = [
        "Important Notification",
        "New Offer Available",
        "Discover Our Latest Services",
    ];

    // Define possible sentences (with variations)
    $sentences = [
        ["Welcome!", "Hello!", "Dear customer,"],
        ["We are excited to share our latest promotion.", "Our newest updates might interest you.", "Don't miss out on our latest opportunities!"],
        ["Please visit our website for more information.", "Details can be found on our website.", "Find additional information on our homepage."],
    ];

    // Send emails
    sendEmail($emailAddresses, $subjects, $sentences);

    ?>

    Suggerimento importante: Contenuto randomizzato per evitare lo SPAM
    Nel nostro articolo su come evitare i filtri SPAM, abbiamo già sottolineato che vale la pena randomizzare il contenuto delle e-mail. Anche il codice PHP sopra fa questo selezionando casualmente argomenti e frasi.

      Soluzione avanzata: Utilizzo di un server web locale e un database
      Se hai bisogno di una soluzione più complessa, è possibile eseguire un server web locale (ad esempio Apache o Nginx). Il seguente codice recupera i destinatari da un database MySQL mentre invia e-mail con contenuti randomizzati.

      <?php
      //exit;

      set_time_limit(999999999);
      ini_set("max_execution_time", 30000); //sec

      ini_set("display_errors", 1);
      ini_set("display_startup_errors", 1);
      error_reporting(E_ALL);
      header("Content-Type: text/html; charset=utf-8");
      header("Content-Type: text/html; charset=UTF-8");

      mb_internal_encoding("UTF-8");
      mb_http_output("UTF-8");
      mb_http_input("UTF-8");
      mb_regex_encoding("UTF-8");

      //---------sanitize incoming parameters start

      if (!empty($_POST)) {
          foreach ($_POST as $post => $value) {
              $_POST[$post] = addslashes($_POST[$post]);
          }
      }
      if (!empty($_PUT)) {
          foreach ($_PUT as $put => $value) {
              $_PUT[$put] = addslashes($_PUT[$put]);
          }
      }
      if (!empty($_GET)) {
          foreach ($_GET as $get => $value) {
              $_GET[$get] = addslashes($_GET[$get]);
          }
      }
      if (!empty($_REQUEST)) {
          foreach ($_REQUEST as $key => $value) {
              $_REQUEST[$key] = addslashes($_REQUEST[$key]);
          }
      }
      //---------sanitize incoming parameters end

      require_once dirname(__FILE__) . "/phpmailer-6.1.1/Exception.php";
      require_once dirname(__FILE__) . "/phpmailer-6.1.1/OAuth.php";
      require_once dirname(__FILE__) . "/phpmailer-6.1.1/PHPMailer.php";
      require_once dirname(__FILE__) . "/phpmailer-6.1.1/POP3.php";
      require_once dirname(__FILE__) . "/phpmailer-6.1.1/SMTP.php";

      /*CONFIG*/
      /*CONFIG*/
      /*CONFIG*/
      /*CONFIG*/

      echo memory_get_usage() . "<br>";

      $host = "localhost";
      $user = "root";
      $pswd = "";
      $database = "multikuldo";

      $connect = mysqli_connect($host, $user, $pswd, $database);

      mysqli_query($connect, "set names utf8");
      mysqli_select_db($connect, $database);

      $sleeptime = 3; // 3 is optimal
      $runtime = 0;
      $testcount = 50; // Send test email every 50th email
      $testemail = "yourtest@gmail.com";
      $table_name = "emails";

      function getRandElementFromArray($array)
      {
          return $array[array_rand($array, 1)];
      }

      /*SENTENCE VARIATIONS*/
      /*SENTENCE VARIATIONS*/
      /*SENTENCE VARIATIONS*/
      /*SENTENCE VARIATIONS*/
      /*SENTENCE VARIATIONS*/
      /*SENTENCE VARIATIONS*/

      $fromemail[0][] = "sender@gmail.com";

      $sender[0][] = "sender name1";
      $sender[0][] = "sender name2";
      $sender[0][] = "sender name3";

      $subject[0][] = "subject1";
      $subject[0][] = "subject2";
      $subject[0][] = "subject3";

      $body[0][] = "Welcome!";
      $body[0][] = "Dear Editor!";

      $body[1][] = "body1";
      $body[1][] = "body2";
      $body[1][] = "body3";
      $body[2][] = "body1";
      $body[2][] = "body2";
      $body[2][] = "body3";
      $body[3][] = "body1";
      $body[3][] = "body2";
      $body[3][] = "body3";

      /*SENTENCE VARIATIONS*/
      /*SENTENCE VARIATIONS*/
      /*SENTENCE VARIATIONS*/
      /*SENTENCE VARIATIONS*/
      /*SENTENCE VARIATIONS*/
      /*SENTENCE VARIATIONS*/

      do {
          // Start the loop if not redirected via JavaScript
          sleep($sleeptime);

          // Create a PHPMailer instance
          $phpmailer = new PHPMailer\PHPMailer\PHPMailer();

          set_time_limit(9999999);

          $isz = file_get_contents("isz.txt"); // previous email id
          echo "<br>isz: " . $isz . "<br>";

          // Fetch the data to be sent
          $query =
              "
      		SELECT *
      		FROM " .
              $table_name .
              "
      		WHERE
      		sended = '0' 
      		LIMIT 1

              ";

          echo $query . "<hr>";
          $sql_result = mysqli_query($connect, $query);

          $result = [];
          while ($row = mysqli_fetch_array($sql_result)) {
              $result[] = $row;
          }
          //print_r($result);
          if (empty($result)) {
              die("the end");
          }
          //exit;

          file_put_contents("isz.txt", $result[0]["id"]); // one more than what was written
          $log = file_get_contents("log.txt");

          try {
              // Debugging settings
              $phpmailer->SMTPDebug = 1;

              // Set character encoding
              $phpmailer->CharSet = "UTF-8";

              // Set email format to HTML
              $phpmailer->isHTML(true);

              // Sender details
              $phpmailer->setFrom(
                  $fromemail[0][rand(0, count($fromemail[0]) - 1)],
                  $sender[0][rand(0, count($sender[0]) - 1)]
              );
              $phpmailer->AddReplyTo(
                  $fromemail[0][rand(0, count($fromemail[0]) - 1)],
                  $sender[0][rand(0, count($sender[0]) - 1)]
              );

              $phpmailer->Sender = $phpmailer->From;

              // Recipient details
              $cimzettnev = explode("@", $result[0]["email"]);
              $phpmailer->addAddress($result[0]["email"], $cimzettnev[1]);

              // SMTP connection settings for sending the email
              $phpmailer->isSMTP();
              $phpmailer->Host = "ssl://smtp.gmail.com";
              $phpmailer->Port = 465;
              $phpmailer->SMTPAuth = true;
              $phpmailer->AuthType = "LOGIN"; // 'CRAM-MD5', 'PLAIN', 'LOGIN
              //$phpmailer->SMTPSecure = false;
              $phpmailer->SMTPSecure = "ssl";
              //$phpmailer->SMTPAutoTLS = false;
              $phpmailer->Username = "your@gmail.com";
              $phpmailer->Password = "12345";

              // Message content
              $phpmailer->Subject = "" . $subject[0][rand(0, count($subject[0]) - 1)];
              
              // HTML body
              $phpmailer->Body =
                  '<html> ... </html>'; // Truncated for brevity

              // Send the email
              $phpmailer->Send();

              // Mark the sent data
              $query =
                  "
      		UPDATE " .
                  $table_name .
                  "
      		SET sended = 1 
      		WHERE id = '" .
                  $result[0]["id"] .
                  "'
          ";

              mysqli_query($connect, $query);

          } catch (phpmailerException $err) {
              // Log mailer error
          } catch (Exception $err) {
              // Log general error
          }
      } while (!empty($result));
      echo memory_get_usage() . "<br>";
      echo "ready";
      ?>

      Link correlati:

        Sia i metodi semplici che quelli avanzati offrono opzioni flessibili per l’invio di email di massa. Scegli la soluzione adatta alle tue esigenze e inizia la tua campagna!