你可以做一个测试，如果你需要它通过修补如下代码

# SSH into droplet
# go to project
$ php artisan tinker
$ Mail::send('errors.401', [], function ($message) { $message->to('emmanuelbarturen@gmail.com')->subject('this works!'); });
# check your mailbox

   $emailTextHtml='<h1>email sent from php use by phpmailer</h1>';

require 'PHPMailer/PHPMailerAutoload.php';
$mail = new PHPMailer(true);                          // Passing `true` enables exceptions
try {
    //Server settings
    //$mail->SMTPDebug = 2;                                 // Enable verbose debug output
    $mail->isSMTP();                                      // Set mailer to use SMTP
    $mail->Host = 'smtp.gmail.com';  // Specify main and backup SMTP servers
    $mail->SMTPAuth = true;                               // Enable SMTP authentication
    $mail->Username = 'demo@gmail.com';                 // SMTP username of gmail
    $mail->Password = '2345678';                           // SMTP password of gmail
    $mail->SMTPSecure = 'tls';                            // Enable TLS encryption, `ssl` also accepted
    $mail->Port = 587;                                    // TCP port to connect to

    //Recipients
    $mail->setFrom('anupam@gmail.com', 'study'); // provide your gmail username 
    $mail->addAddress('komal@gmail.com', 'study');     // Add a recipient
    $mail->addReplyTo('anupamverma@gmail.com', 'Information');

    //Content
    $mail->isHTML(true);                          // Set email format to HTML
     $mail->Subject = 'Register client details and total client details';
     $mail->Body= "$emailTextHtml";    //write the html code
    $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;
}
     

    
    

你也可以在https://github.com/PHPMailer/PHPMailer上使用PHPMailer类。

它允许您使用邮件功能或透明地使用smtp服务器。它还可以处理基于HTML的电子邮件和附件，因此您不必编写自己的实现。

这个类是稳定的，它被许多其他项目使用，如Drupal、SugarCRM、Yii和Joomla!

下面是上面页面的一个例子:

<?php
require 'PHPMailerAutoload.php';

$mail = new PHPMailer;

$mail->isSMTP();                                      // Set mailer to use SMTP
$mail->Host = 'smtp1.example.com;smtp2.example.com';  // Specify main and backup SMTP servers
$mail->SMTPAuth = true;                               // Enable SMTP authentication
$mail->Username = 'user@example.com';                 // SMTP username
$mail->Password = 'secret';                           // SMTP password
$mail->SMTPSecure = 'tls';                            // Enable encryption, 'ssl' also accepted

$mail->From = 'from@example.com';
$mail->FromName = 'Mailer';
$mail->addAddress('joe@example.net', 'Joe User');     // Add a recipient
$mail->addAddress('ellen@example.com');               // Name is optional
$mail->addReplyTo('info@example.com', 'Information');
$mail->addCC('cc@example.com');
$mail->addBCC('bcc@example.com');

$mail->WordWrap = 50;                                 // Set word wrap to 50 characters
$mail->addAttachment('/var/tmp/file.tar.gz');         // Add attachments
$mail->addAttachment('/tmp/image.jpg', 'new.jpg');    // Optional name
$mail->isHTML(true);                                  // Set email format to HTML

$mail->Subject = 'Here is the subject';
$mail->Body    = 'This is the HTML message body <b>in bold!</b>';
$mail->AltBody = 'This is the body in plain text for non-HTML mail clients';

if(!$mail->send()) {
    echo 'Message could not be sent.';
    echo 'Mailer Error: ' . $mail->ErrorInfo;
} else {
    echo 'Message has been sent';
}

对于未来的读者:如果其他答案都不管用(就像我的情况一样)，试试这个:

1)。下载PHPMailer，打开zip文件并解压到您的项目目录。

3)。将提取的目录重命名为phpailer，并在php脚本中编写以下代码(脚本必须在phpailer文件夹之外)

<?php
// PHPMailer classes into the global namespace
use PHPMailer\PHPMailer\PHPMailer; 
use PHPMailer\PHPMailer\Exception;
// Base files 
require 'PHPMailer/src/Exception.php';
require 'PHPMailer/src/PHPMailer.php';
require 'PHPMailer/src/SMTP.php';
// create object of PHPMailer class with boolean parameter which sets/unsets exception.
$mail = new PHPMailer(true);                              
try {
    $mail->isSMTP(); // using SMTP protocol                                     
    $mail->Host = 'smtp.gmail.com'; // SMTP host as gmail 
    $mail->SMTPAuth = true;  // enable smtp authentication                             
    $mail->Username = 'sender@gmail.com';  // sender gmail host              
    $mail->Password = 'password'; // sender gmail host password                          
    $mail->SMTPSecure = 'tls';  // for encrypted connection                           
    $mail->Port = 587;   // port for SMTP     

    $mail->setFrom('sender@gmail.com', "Sender"); // sender's email and name
    $mail->addAddress('receiver@gmail.com', "Receiver");  // receiver's email and name

    $mail->Subject = 'Test subject';
    $mail->Body    = 'Test body';

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

如果你对html格式的电子邮件感兴趣，请确保传递Content-type: text/html;在头文件中。例子:

// multiple recipients
$to  = 'aidan@example.com' . ', '; // note the comma
$to .= 'wez@example.com';

// subject
$subject = 'Birthday Reminders for August';

// message
$message = '
<html>
<head>
  <title>Birthday Reminders for August</title>
</head>
<body>
  <p>Here are the birthdays upcoming in August!</p>
  <table>
    <tr>
      <th>Person</th><th>Day</th><th>Month</th><th>Year</th>
    </tr>
    <tr>
      <td>Joe</td><td>3rd</td><td>August</td><td>1970</td>
    </tr>
    <tr>
      <td>Sally</td><td>17th</td><td>August</td><td>1973</td>
    </tr>
  </table>
</body>
</html>
';

// To send HTML mail, the Content-type header must be set
$headers  = 'MIME-Version: 1.0' . "\r\n";
$headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";

// Additional headers
$headers .= 'To: Mary <mary@example.com>, Kelly <kelly@example.com>' . "\r\n";
$headers .= 'From: Birthday Reminder <birthday@example.com>' . "\r\n";
$headers .= 'Cc: birthdayarchive@example.com' . "\r\n";
$headers .= 'Bcc: birthdaycheck@example.com' . "\r\n";

// Mail it
mail($to, $subject, $message, $headers);

要了解更多细节，请查看php邮件函数。

用这个脚本发送了电子邮件

<h2>Test Mail</h2>
<?php

if (!isset($_POST["submit"]))
  {
  ?>
  <form method="post" action="<?php echo $_SERVER["PHP_SELF"];?>">
  From: <input type="text" name="from"><br>
  Subject: <input type="text" name="subject"><br>
  Message: <textarea rows="10" cols="40" name="message"></textarea><br>
  <input type="submit" name="submit" value="Click To send mail">
  </form>
  <?php
  }

else

  {

  if (isset($_POST["from"]))
    {
    $from = $_POST["from"]; // sender
    $subject = $_POST["subject"];
    $message = $_POST["message"];

    $message = wordwrap($message, 70);

    mail("Test@example.com",$subject,$message,"From: $from\n");
    echo "Thank you for sending an email";
    }
  }
?>

一旦你按下发送电子邮件按钮，电子邮件将被发送到Test@example.com