使用 PHP 安全地传送电子邮件：使用 SMTP 发送无垃圾邮件的指南

composer require phpmailer/phpmailer

<?php// load composer's autoloader if using composerrequire 'vendor/autoload.php';// import phpmailer classes into the global namespaceuse phpmailerphpmailerphpmailer;use phpmailerphpmailerexception;$mail = new phpmailer(true);try {    //server settings    $mail->issmtp();                                          // use smtp    $mail->host = 'smtp.example.com';                         // set the smtp server (use your smtp provider)    $mail->smtpauth = true;                                   // enable smtp authentication    $mail->username = 'your_email@example.com';               // smtp username    $mail->password = 'your_password';                        // smtp password    $mail->smtpsecure = phpmailer::encryption_starttls;       // enable tls encryption, `ssl` also accepted    $mail->port = 587;                                        // tcp port to connect to (587 is common for tls)    //recipients    $mail->setfrom('your_email@example.com', 'your name');    $mail->addaddress('recipient@example.com', 'recipient name');  // add recipient    $mail->addreplyto('reply_to@example.com', 'reply address');    // add a reply-to address    // content    $mail->ishtml(true);                                        // set email format to html    $mail->subject = 'test email subject';    $mail->body    = 'this is a <b>test email</b> sent using phpmailer and smtp.';    $mail->altbody = 'this is a plain-text version of the email for non-html email clients.';    // send the email    $mail->send();    echo 'message has been sent';} catch (exception $e) {    echo "message could not be sent. mailer error: {$mail->errorinfo}";}

php send_email.php

message has been sent

Message could not be sent. Mailer Error: {Error Message}