linux下phpmailer發送郵件出現SMTP ERROR: Failed to connect to server: (0)錯誤

在做項目的過程中，后期客戶提出了發送郵件的需求，既然客戶有需求，那么沒啥說的，上唄。

經過網上的一般資料查找，PHPMailer這個插件貌似用起來不錯，那就從github clone一份下來，下載鏈接是PHPMailer。

官當demo如下：當然相關的配置要換成你自己的

//Create a new PHPMailer instance
$mail = new PHPMailer;
//Tell PHPMailer to use SMTP
$mail->isSMTP();
//Enable SMTP debugging
// 0 = off (for production use)
// 1 = client messages
// 2 = client and server messages
$mail->SMTPDebug = 2;
//Set the hostname of the mail server
$mail->Host = 'smtp.qq.com';
//$mail->Host = 'smtp.163.com';
//Set the SMTP port number - likely to be 25, 465 or 587
$mail->Port = 465;
$mail->SMTPSecure = "ssl";
//$mail->SMTPAuth = false;
//$mail->SMTPSecure = false;
//Whether to use SMTP authentication
$mail->SMTPAuth = true;
//Username to use for SMTP authentication
$mail->Username = '[e-mail]';
//$mail->Username = '[e-mail]';
//Password to use for SMTP authentication
//$mail->Password = 'lingshuan008';
$mail->Password = 'password';
//Set who the message is to be sent from
//$mail->setFrom('[e-mail]', 'fromuser');
$mail->setFrom('[e-mail]', 'fromuser');
//Set an alternative reply-to address
//$mail->addReplyTo('[e-mail]', 'First Last');
$mail->addReplyTo('[e-mail]', 'First Last');
//Set who the message is to be sent to
$mail->addAddress('[e-mail]', 'John Doe');
//Set the subject line
$mail->Subject = 'PHPMailer SMTP test';
//Read an HTML message body from an external file, convert referenced images to embedded,
//convert HTML into a basic plain-text alternative body
//$mail->msgHTML(file_get_contents('contents.html'), __DIR__);
$mail->msgHTML('hello,body!');
//Replace the plain text body with one created manually
$mail->AltBody = 'This is a plain-text message body';
//Attach an image file
//$mail->addAttachment('images/phpmailer_mini.png');

//send the message, check for errors
if (!$mail->send()) {
    echo 'Mailer Error: ' . $mail->ErrorInfo;
} else {
    echo 'Message sent!';
}

 

首先本地windows下，發送成功，很happy，那就放上linux上試下，一運行，出現

SMTP ERROR: Failed to connect to server: (0)
SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting
Mailer Error: SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting

然后各大技術論壇查資料；首先檢查linux服務器上的openssl和sockets已經開啟，fsockopen函數也沒有禁用，郵箱的smtp服務也已經開啟，依然還是不行。至於有一種說法將smtp換成SMTP，是能夠發送成功，后來查看下源碼，發現這種只是通過sendmail發送的，不是smtp。然后，直接在linux上ping smtp.qq.com,telnet  smtp.qq.com 465都沒什么問題，可是依然發送報上述的錯誤，后來查看官網資料，發現下面一段代碼

$mail->SMTPOptions = array(
'ssl' => array(
    'verify_peer' => false,
    'verify_peer_name' => false,
    'allow_self_signed' => true
    )
);

就猜測了是不是自己的ssl認證沒有通過，將這段代碼加上之后，神奇的事情發生了，郵件發送成功。

到此，問題圓滿解決。

如有疑問，可以留言。

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