从PHP发送电子邮件的核心方法是使用其内置的mail()函数，但有几个现成的sdk可以简化集成:

Swiftmailer PHPMailer peppost(通过HTTP工作，因此可以避免SMTP端口阻塞问题) Sendmail

附注:我受雇于peppost公司。

这是非常基本的方法发送纯文本电子邮件使用邮件功能。

<?php
$to = 'SomeOtherEmailAddress@Domain.com';
$subject = 'This is subject';
$message = 'This is body of email';
$from = "From: FirstName LastName <SomeEmailAddress@Domain.com>";
mail($to,$subject,$message,$from);

<?php
include "db_conn.php";//connection file
require "PHPMailerAutoload.php";// it will be in PHPMailer
require "class.smtp.php";// it will be in PHPMailer
require "class.phpmailer.php";// it will be in PHPMailer


$response = array();
$params = json_decode(file_get_contents("php://input"));

if(!empty($params->email_id)){

    $email_id = $params->email_id;
    $flag=false;
    echo "something";
    if(!filter_var($email_id, FILTER_VALIDATE_EMAIL))
    {
        $response['ERROR']='EMAIL address format error'; 
        echo json_encode($response,JSON_UNESCAPED_SLASHES);
        return;
    }
    $sql="SELECT * from sales where email_id ='$email_id' ";

    $result = mysqli_query($conn,$sql);
    $count = mysqli_num_rows($result);

    $to = "demo@gmail.com";
    $subject = "DEMO Subject";
    $messageBody ="demo message .";

    if($count ==0){
        $response["valid"] = false;
        $response["message"] = "User is not registered yet";
        echo json_encode($response);
        return;
    }

    else {

        $mail = new PHPMailer();
        $mail->IsSMTP();
        $mail->SMTPAuth = true; // authentication enabled
        $mail->IsHTML(true); 
        $mail->SMTPSecure = 'ssl';//turn on to send html email
        // $mail->Host = "ssl://smtp.zoho.com";
        $mail->Host = "p3plcpnl0749.prod.phx3.secureserver.net";//you can use gmail 
        $mail->Port = 465;
        $mail->Username = "demousername@example.com";
        $mail->Password = "demopassword";
        $mail->SetFrom("demousername@example.com", "Any demo alert");
        $mail->Subject = $subject;

        $mail->Body = $messageBody;
        $mail->AddAddress($to);
        echo "yes";

        if(!$mail->send()) {
           echo "Mailer Error: " . $mail->ErrorInfo;
       } 
       else {
           echo "Message has been sent successfully";
      }
    }

}
else{
    $response["valid"] = false;
    $response["message"] = "Required field(s) missing";
    echo json_encode($response);
}


?>

上面的代码为我工作。

试试这个:

<?php
$to = "somebody@example.com";
$subject = "My subject";
$txt = "Hello world!";
$headers = "From: webmaster@example.com" . "\r\n" .
"CC: somebodyelse@example.com";

mail($to,$subject,$txt,$headers);
?>

我尝试在我的快速时间，我有同样的问题，但经过适当的研究，我解决了它。以下是我的方法。您必须下载PHPMailer源文件，并在项目中手动包含所需的文件。

您可以从PHPMailer主页1下载带有源代码的ZIP文件，点击“克隆或下载”绿色按钮(在右侧)，然后选择“下载ZIP”。在要保存源文件的目录中解压缩包。

1来自:GitHub。 第二步:打开“(来自Gmail地址)谷歌帐户”，执行以下步骤:

禁用谷歌帐号的双因素密码验证。

Turn on Less Security. Allow third party app. There you Go.. <?php use PHPMailer\PHPMailer\PHPMailer; use PHPMailer\PHPMailer\Exception; require 'PHPMailer/src/Exception.php'; require 'PHPMailer/src/PHPMailer.php'; require 'PHPMailer/src/SMTP.php'; session_start(); if (isset($_POST['send'])) { $email = $_POST['email']; $subject = $_POST['subject']; $message = "I am trying"; //Load composer's autoloader $mail = new PHPMailer(true); try { //Server settings $mail->isSMTP(); $mail->Host = 'smtp.gmail.com'; $mail->SMTPAuth = true; $mail->Username = 'youremail@gmail.com'; $mail->Password = 'password'; $mail->SMTPOptions = array( 'ssl' => array( 'verify_peer' => false, 'verify_peer_name' => false, 'allow_self_signed' => true ) ); $mail->SMTPSecure = 'ssl'; $mail->Port = 465; //Send Email $mail->setFrom('youremail@gmail.com'); //Recipients $mail->addAddress($email); $mail->addReplyTo('youremail@gmail.com'); //Content $mail->isHTML(true); $mail->Subject = $subject; $mail->Body = $message; $mail->send(); $_SESSION['result'] = 'Message has been sent'; $_SESSION['status'] = 'ok'; } catch (Exception $e) { $_SESSION['result'] = 'Message could not be sent. Mailer Error: ' . $mail->ErrorInfo; $_SESSION['status'] = 'error'; echo 'Message could not be sent. Mailer Error: ' . $mail->ErrorInfo; } } header("location: forgotPassword.php");

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