为什么在尝试发送电子邮件时使用 phpmailer 会出现此错误？

问题描述

2021-03-19 15:17:50 SERVER -> CLIENT: 220 smtp.gmail.com ESMTP t24sm3903607qto.23 - gsmtp
2021-03-19 15:17:50 CLIENT -> SERVER: EHLO localhost
2021-03-19 15:17:50 SERVER -> CLIENT: 250-smtp.gmail.com at your service,[24.233.165.10]250-SIZE 35882577250-8BITMIME250-STARTTLS250-ENHANCEDSTATUSCODES250-PIPELINING250-CHUNKING250 SMTPUTF8
2021-03-19 15:17:50 CLIENT -> SERVER: STARTTLS
2021-03-19 15:17:50 SERVER -> CLIENT: 220 2.0.0 Ready to start TLS
2021-03-19 15:17:50 CLIENT -> SERVER: EHLO localhost
2021-03-19 15:17:50 SERVER -> CLIENT: 250-smtp.gmail.com at your service,[24.233.165.10]250-SIZE 35882577250-8BITMIME250-AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH250-ENHANCEDSTATUSCODES250-PIPELINING250-CHUNKING250 SMTPUTF8
2021-03-19 15:17:50 CLIENT -> SERVER: AUTH LOGIN
2021-03-19 15:17:50 SERVER -> CLIENT: 334 VXNlcm5hbWU6
2021-03-19 15:17:50 CLIENT -> SERVER: [credentials hidden]
2021-03-19 15:17:50 SERVER -> CLIENT: 334 UGFzc3dvcmQ6
2021-03-19 15:17:50 CLIENT -> SERVER: [credentials hidden]
2021-03-19 15:17:51 SERVER -> CLIENT: 535-5.7.8 Username and Password not accepted. Learn more at535 5.7.8 https://support.google.com/mail/?p=BadCredentials t24sm3903607qto.23 - gsmtp
2021-03-19 15:17:51 SMTP ERROR: Password command Failed: 535-5.7.8 Username and Password not accepted. Learn more at535 5.7.8 https://support.google.com/mail/?p=BadCredentials t24sm3903607qto.23 - gsmtp
SMTP Error: Could not authenticate.
2021-03-19 15:17:51 CLIENT -> SERVER: QUIT
2021-03-19 15:17:51 SERVER -> CLIENT: 221 2.0.0 closing connection t24sm3903607qto.23 - gsmtp
SMTP Error: Could not authenticate.
Message Could not be sent. Mailer Error: SMTP Error: Could not authenticate.

我的代码：

<?PHP
use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;
 
require 'PHPMailer/PHPMailer/src/Exception.PHP';
require 'PHPMailer/PHPMailer/src/PHPMailer.PHP';
require 'PHPMailer/PHPMailer/src/SMTP.PHP';
 
// Instantiation and passing [ICODE]true[/ICODE] enables exceptions
$mail = new PHPMailer(true);
 
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   = 'myemail@gmail.com';                     // SMTP username
    $mail->Password   = '*************';                               // SMTP password
    $mail->SMTPSecure = 'tls';                                  // Enable TLS encryption,[ICODE]ssl[/ICODE] also accepted
    $mail->Port       = 587;                                    // TCP port to connect to
 
    //Recipients
    $mail->setFrom('myemail.com','Mailer');
    $mail->addAddress('myemail@gmail.com','Recipients');     // Add a recipient
    //$mail->addAddress('');
    $mail->addReplyTo('myemai@gmail.com','Mailer');
    //$mail->addCC('');
    //$mail->addBCC('');
 
    // Attachments
    //$mail->addAttachment('');         // Add attachments
    //$mail->addAttachment('');
 
    // Content
    $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';
 
    $mail->send();
    echo 'Message has been sent';
 
} catch (Exception $e) {
    echo "Message Could not be sent. Mailer Error: {$mail->ErrorInfo}";
}

我启用了不太安全的应用。我启用了 IMAP。两步验证关闭。我从github下载了最新版本。电子邮件是我的电子邮件并且确实有效。我应该怎么办？我正在 xampp 上从我的本地主机尝试此操作。我的密码是正确的。为什么会发生这种情况？

解决方法

您多次编辑您的问题，每次都改变其含义，将来应该避免这种情况，因为它会产生评论的语气。相反，下次请阅读错误消息并在询问之前修复它们。你做错了什么（按出场顺序）

不要使用没有值的赋值方法，例如$mail->addAddress('');、$mail->addCC('') 等，为了将来，它会导致错误。
使用正确的 SMTP 服务器地址。
使用正确的凭据。当然，登录名和密码区分大小写。
如果凭据错误仍有问题，请在您的 Gmail 帐户上开启“安全性较低的应用程序”。可以在安全选项卡中完成，如屏幕截图所示

这是一个错字：

$mail->Host       = 'smpt.gmail.com';

应该是：

$mail->Host       = 'smtp.gmail.com';

错误消息本身说找不到主机名，这是完全可以预料的，因为它是错误的。

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