您可以使用CodeIgniter配置电子邮件。例如，使用SMTP(简单方式):

$config = Array(
        'protocol' => 'smtp',
        'smtp_host' => 'mail.domain.com', // Your SMTP host
        'smtp_port' => 26, // Default port for SMTP
        'smtp_user' => 'name@domain.com',
        'smtp_pass' => 'password',
        'mailtype' => 'html',
        'charset' => 'iso-8859-1',
        'wordwrap' => TRUE
);
$message = 'Your msg';
$this->load->library('email', $config);
$this->email->from('name@domain.com', 'Title');
$this->email->to('emaildestination@domain.com');
$this->email->subject('Header');
$this->email->message($message);

if($this->email->send()) 
{
   // Conditional true
}

这对我很管用!

如果只使用mail()函数，则需要完成配置文件。

您需要打开邮件扩展，并设置SMTP smtp_port等，最重要的是，设置您的用户名和密码。没有它，邮件就无法发送。此外，您还可以使用PHPMail类来发送。

我有这个问题，并发现剥离标题帮助我获得邮件。 所以这个:

$headers  = "MIME-Version: 1.0;\r\n";
$headers .= "Content-type: text/plain; charset=utf-8;\r\n";
$headers .= "To: ".$recipient."\r\n";
$headers .= "From: ".__SITE_TITLE."\r\n";
$headers .= "Reply-To: ".$sender."\r\n";

成为这个:

$headers = "From: ".__SITE_TITLE."\r\n";
$headers .= "Reply-To: ".$sender."\r\n";

不需要To:标头。

邮件客户端非常擅长嗅出url并将其重写为超链接。所以我不需要编写HTML并在content-type头文件中指定text/ HTML。我只是在消息体中添加了带\r\n的新行。 我知道这不是编码纯粹主义者的方法，但它适用于我所需要的。

你可以使用PHPMailer，它工作得很完美，这里有一个代码示例:

<?php
use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;

require 'vendor/phpmailer/phpmailer/src/Exception.php';
require 'vendor/phpmailer/phpmailer/src/PHPMailer.php';
require 'vendor/phpmailer/phpmailer/src/SMTP.php';
$editor = $_POST["editor"];
$subject = $_POST["subject"];
$to = $_POST["to"];

try {

    if ($_SERVER["REQUEST_METHOD"] == "POST") {

        $mail = new PHPMailer();
        $mail->IsSMTP();
        $mail->Mailer = "smtp";
        $mail->SMTPDebug  = 1;
        $mail->SMTPAuth   = TRUE;
        $mail->SMTPSecure = "tls";
        $mail->Port       = 587;
        $mail->Host       = "smtp.gmail.com";//using smtp server
        $mail->Username   = "XXXXXXXXXX@gmail.com";//the email which will send the email 
        $mail->Password   = "XXXXXXXXXX";//the password

        $mail->IsHTML(true);
        $mail->AddAddress($to, "recipient-name");
        $mail->SetFrom("XXXXXXXXXX@gmail.com", "from-name");
        $mail->AddReplyTo("XXXXXXXXXX@gmail.com", "reply-to-name");
        $mail->Subject = $subject;
        $mail->MsgHTML($editor);




        if (!$mail->Send()) {
            echo "Error while sending Email.";
            var_dump($mail);
        } else {
            echo "Email sent successfully";
        }
    }
} catch (Exception $e) {
    echo $e->getMessage();
}

你可以通过以下方法查看错误:

error_reporting(E_ALL);

我的示例代码是:

<?php
    use PHPMailer\PHPMailer\PHPMailer;
    require 'PHPMailer.php';
    require 'SMTP.php';
    require 'Exception.php';

    $name = $_POST['name'];
    $mailid = $_POST['mail'];
    $mail = new PHPMailer;
    $mail->IsSMTP();
    $mail->SMTPDebug = 0;                   // Set mailer to use SMTP
    $mail->Host = 'smtp.gmail.com';         // Specify main and backup server
    $mail->Port = 587;                      // Set the SMTP port
    $mail->SMTPAuth = true;                 // Enable SMTP authentication
    $mail->Username = 'someone@gmail.com';  // SMTP username
    $mail->Password = 'password';           // SMTP password
    $mail->SMTPSecure = 'tls';              // Enable encryption, 'ssl' also accepted

    $mail->From = 'someone@gmail.com';
    $mail->FromName = 'name';
    $mail->AddAddress($mailid, $name);       // Name is optional
    $mail->IsHTML(true);                     // Set email format to HTML
    $mail->Subject = 'Here is the subject';
    $mail->Body    = 'Here is your message' ;
    $mail->AltBody = 'This is the body in plain text for non-HTML mail clients';
    if (!$mail->Send()) {
       echo 'Message could not be sent.';
       echo 'Mailer Error: ' . $mail->ErrorInfo;
       exit;
    }
    echo 'Message has been sent';
?>

我在000webhost上做了以下工作:

$headers  = "MIME-Version: 1.0" . "\r\n";
$headers .= "Content-type: text/html; charset=iso-8859-1" . "\r\n";
$headers .= "From: ". $from. "\r\n";
$headers .= "Reply-To: ". $from. "\r\n";
$headers .= "X-Mailer: PHP/" . phpversion();
$headers .= "X-Priority: 1" . "\r\n";

发送邮件时直接输入邮箱地址:

mail('email@gmail.com', $subject, $message, $headers)

使用“and not”。

这个代码工作，但电子邮件收到了半小时的延迟。