Mandrill:SMTP错误：无法连接到服务器：连接超时（110）

我有以下配置，可以在一小时内向50个客户发送大量电子邮件

SMTP提供程序：Mandrill

每小时限额：380封电子邮件/小时

邮箱声誉：良好，不滥发垃圾邮件

PHPMailer:版本5

问题：当我执行脚本时，有时它会向50位客户中的每一位发送邮件，而有时，它会停止发送邮件，说：

SMTP错误：无法连接到服务器：连接超时110

它会自动恢复并向剩余的客户发送电子邮件

我的代码：

我可以很好地运行send脚本，然后一个接一个地连续运行2到3次。它工作正常，但突然无法连接

我问了这个问题作为评论。有人建议我在现场提出一个新问题

除了添加，我不知道在哪里修复

$phpMailer->SMTPKeepAlive=true；和$phpMailer->SmtpClose；前后for循环

不过，我不知道这是否正确的做法

您的建议，以解决上述问题将高度赞赏

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谢谢

这看起来确实像是一个mandrill问题-您在PHPMailer中做的一切都是正确的。他们可能正在使用循环DNS将连接分散到服务器池上，其中一个或多个服务器可能已关闭。如果他们的服务器工作不正常，那么在你这一方你真的无能为力。唯一真正的退路是使用本地邮件服务器，并将其设置为通过mandrill进行中继。这将负责排队和重试发送，还可以使你的应用程序能够处理其他事情，因为发送是异步的

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您肯定应该使用SMTPKeepAlive—它将使发送更加高效，并减少发生此问题的可能性，因为它只使用一台服务器。

根据您的本地环境，这也可能是因为您的主机提供商或ISP限制出站SMTP连接。有些具有速率限制，或者如果超过某些限制，将重定向连接。您也可能有smtp.mandrillapp.com的过时DNS记录，这将导致您的系统尝试在不再用于该主机名的IP地址上访问smtp.mandrillapp.com。您可以使用Wireshark之类的工具来实际跟踪您正在连接或试图连接的特定IP。PHPMailer可能还提供了更多详细的日志记录，但您希望了解更多有关您试图连接到何处以确定问题的详细信息

    {
    $mail = new PHPMailer(true);
    $mail->isSMTP();
    $mail->SMTPDebug = 4;
    $mail->Debugoutput = 'html';
    $mail->Host = SMTP_HOST;
    $mail->Port = 25;
    $mail->SMTPAuth = true;
    $mail->Username = SMTP_USERNAME;
    $mail->Password = SMTP_PASSWORD;
    $mail->setFrom(SMTP_USERNAME, SMTP_NAME);

    For Loop{
    $msgHTML = "<table width='500px;' align='center'>";
    $msgHTML .= "<tr><td>Dear Customer</td></tr>";
    $msgHTML .= "</table>";


    $mail->addReplyTo();
    $mail->addAddress();
    $mail->Subject = 'Loan Request Follow Up from xyzdummy.com.';
    $mail->msgHTML($msgHTML);
    $mail->AltBody = 'This is a plain-text message body';
    try{
    $mail->send();
    echo "Mail Sent to ->".$forloop[$j]['EmailId'] ;
    }
    catch (phpmailerException $e) 
    { 
    echo $e->errorMessage(); //Pretty error messages from PHPMailer
    echo "Mail Failed to ->".$forloop[$j]['EmailId'] ;
    }


    $mail->clearAddresses();
    $mail->clearCCs();
    $mail->clearBCCs();     
    }   
    }

            Connection: opening to smtp.mandrillapp.com:25, t=10, opt=array ()
            Connection: opened
            SMTP -> get_lines(): $data was ""
            SMTP -> get_lines(): $str is "220 smtp.mandrillapp.com ESMTP"
            SMTP -> get_lines(): $data is "220 smtp.mandrillapp.com ESMTP"
            SERVER -> CLIENT: 220 smtp.mandrillapp.com ESMTP
            CLIENT -> SERVER: EHLO smtp.mandrillapp.com
            SMTP -> get_lines(): $data was ""
            SMTP -> get_lines(): $str is "250-relay-2.ap-southeast-1.mandrill-relay-prod"
            SMTP -> get_lines(): $data is "250-relay-2.ap-southeast-1.mandrill-relay-prod"
            SMTP -> get_lines(): $data was "250-relay-2.ap-southeast-1.mandrill-relay-prod"
            SMTP -> get_lines(): $str is "250-PIPELINING"
            SMTP -> get_lines(): $data is "250-relay-2.ap-southeast-1.mandrill-relay-prod250-PIPELINING"
            SMTP -> get_lines(): $data was "250-relay-2.ap-southeast-1.mandrill-relay-prod250-PIPELINING"
            SMTP -> get_lines(): $str is "250-SIZE 26214400"
            SMTP -> get_lines(): $data is "250-relay-2.ap-southeast-1.mandrill-relay-prod250-PIPELINING250-SIZE 26214400"
            SMTP -> get_lines(): $data was "250-relay-2.ap-southeast-1.mandrill-relay-prod250-PIPELINING250-SIZE 26214400"
            SMTP -> get_lines(): $str is "250-STARTTLS"
            SMTP -> get_lines(): $data is "250-relay-2.ap-southeast-1.mandrill-relay-prod250-PIPELINING250-SIZE 26214400250-STARTTLS"
            SMTP -> get_lines(): $data was "250-relay-2.ap-southeast-1.mandrill-relay-prod250-PIPELINING250-SIZE 26214400250-STARTTLS"
            SMTP -> get_lines(): $str is "250-AUTH PLAIN LOGIN"
            SMTP -> get_lines(): $data is "250-relay-2.ap-southeast-1.mandrill-relay-prod250-PIPELINING250-SIZE 26214400250-STARTTLS250-AUTH PLAIN LOGIN"
            SMTP -> get_lines(): $data was "250-relay-2.ap-southeast-1.mandrill-relay-prod250-PIPELINING250-SIZE 26214400250-STARTTLS250-AUTH PLAIN LOGIN"
            SMTP -> get_lines(): $str is "250-ENHANCEDSTATUSCODES"
            SMTP -> get_lines(): $data is "250-relay-2.ap-southeast-1.mandrill-relay-prod250-PIPELINING250-SIZE 26214400250-STARTTLS250-AUTH PLAIN LOGIN250-ENHANCEDSTATUSCODES"
            SMTP -> get_lines(): $data was "250-relay-2.ap-southeast-1.mandrill-relay-prod250-PIPELINING250-SIZE 26214400250-STARTTLS250-AUTH PLAIN LOGIN250-ENHANCEDSTATUSCODES"
            SMTP -> get_lines(): $str is "250 8BITMIME"
            SMTP -> get_lines(): $data is "250-relay-2.ap-southeast-1.mandrill-relay-prod250-PIPELINING250-SIZE 26214400250-STARTTLS250-AUTH PLAIN LOGIN250-ENHANCEDSTATUSCODES250 8BITMIME"
            SERVER -> CLIENT: 250-relay-2.ap-southeast-1.mandrill-relay-prod250-PIPELINING250-SIZE 26214400250-STARTTLS250-AUTH PLAIN LOGIN250-ENHANCEDSTATUSCODES250 8BITMIME
            CLIENT -> SERVER: AUTH LOGIN
            SMTP -> get_lines(): $data was ""
            bl abla
            CLIENT -> SERVER: 
            CLIENT -> SERVER: .
            SMTP -> get_lines(): $data was ""
            SMTP -> get_lines(): $str is "250 2.0.0 Ok: queued as D1D682A0B20"
            SMTP -> get_lines(): $data is "250 2.0.0 Ok: queued as D1D682A0B20"
            SERVER -> CLIENT: 250 2.0.0 Ok: queued as D1D682A0B20
            CLIENT -> SERVER: QUIT
            SMTP -> get_lines(): $data was ""
            SMTP -> get_lines(): $str is "221 2.0.0 Bye"
            SMTP -> get_lines(): $data is "221 2.0.0 Bye"
            SERVER -> CLIENT: 221 2.0.0 Bye
            Connection: closed



            Connection: opening to smtp.mandrillapp.com:25, t=10, opt=array ()
            SMTP ERROR: Failed to connect to server: Connection timed out (110)
            SMTP connect() failed.
            SMTP connect() failed.

            Connection: opening to smtp.mandrillapp.com:25, t=10, opt=array ()
            SMTP ERROR: Failed to connect to server: Connection timed out (110)
            SMTP connect() failed.
            SMTP connect() failed.


            Connection: opening to smtp.mandrillapp.com:25, t=10, opt=array ()
            SMTP ERROR: Failed to connect to server: Connection timed out (110)
            SMTP connect() failed.
            SMTP connect() failed.

            SMTP ERROR: Failed to connect to server: Connection timed out (110)
            SMTP connect() failed.
            SMTP connect() failed.

            Connection: opening to smtp.mandrillapp.com:25, t=10, opt=array ()
            Connection: opened
            SMTP -> get_lines(): $data was ""
            SMTP -> get_lines(): $str is "220 smtp.mandrillapp.com ESMTP"
            SMTP -> get_lines(): $data is "220 smtp.mandrillapp.com ESMTP"
            SERVER -> CLIENT: 220 smtp.mandrillapp.com ESMTP
            CLIENT -> SERVER: EHLO smtp.mandrillapp.com
            SMTP -> get_lines(): $data was ""
            SMTP -> get_lines(): $str is "250-relay-2.ap-southeast-1.mandrill-relay-prod"
            SMTP -> get_lines(): $data is "250-relay-2.ap-southeast-1.mandrill-relay-prod"
            SMTP -> get_lines(): $data was "250-relay-2.ap-southeast-1.mandrill-relay-prod"
            SMTP -> get_lines(): $str is "250-PIPELINING"
            SMTP -> get_lines(): $data is "250-relay-2.ap-southeast-1.mandrill-relay-prod250-PIPELINING"
            SMTP -> get_lines(): $data was "250-relay-2.ap-southeast-1.mandrill-relay-prod250-PIPELINING"
            SMTP -> get_lines(): $str is "250-SIZE 26214400"
            SMTP -> get_lines(): $data is "250-relay-2.ap-southeast-1.mandrill-relay-prod250-PIPELINING250-SIZE 26214400"
            SMTP -> get_lines(): $data was "250-relay-2.ap-southeast-1.mandrill-relay-prod250-PIPELINING250-SIZE 26214400"
            SMTP -> get_lines(): $str is "250-STARTTLS"
            SMTP -> get_lines(): $data is "250-relay-2.ap-southeast-1.mandrill-relay-prod250-PIPELINING250-SIZE 26214400250-STARTTLS"
            SMTP -> get_lines(): $data was "250-relay-2.ap-southeast-1.mandrill-relay-prod250-PIPELINING250-SIZE 26214400250-STARTTLS"
            SMTP -> get_lines(): $str is "250-AUTH PLAIN LOGIN"
            SMTP -> get_lines(): $data is "250-relay-2.ap-southeast-1.mandrill-relay-prod250-PIPELINING250-SIZE 26214400250-STARTTLS250-AUTH PLAIN LOGIN"
            SMTP -> get_lines(): $data was "250-relay-2.ap-southeast-1.mandrill-relay-prod250-PIPELINING250-SIZE 26214400250-STARTTLS250-AUTH PLAIN LOGIN"
            SMTP -> get_lines(): $str is "250-ENHANCEDSTATUSCODES"
            SMTP -> get_lines(): $data is "250-relay-2.ap-southeast-1.mandrill-relay-prod250-PIPELINING250-SIZE 26214400250-STARTTLS250-AUTH PLAIN LOGIN250-ENHANCEDSTATUSCODES"
            SMTP -> get_lines(): $data was "250-relay-2.ap-southeast-1.mandrill-relay-prod250-PIPELINING250-SIZE 26214400250-STARTTLS250-AUTH PLAIN LOGIN250-ENHANCEDSTATUSCODES"
            SMTP -> get_lines(): $str is "250 8BITMIME"
            SMTP -> get_lines(): $data is "250-relay-2.ap-southeast-1.mandrill-relay-prod250-PIPELINING250-SIZE 26214400250-STARTTLS250-AUTH PLAIN LOGIN250-ENHANCEDSTATUSCODES250 8BITMIME"
            SERVER -> CLIENT: 250-relay-2.ap-southeast-1.mandrill-relay-prod250-PIPELINING250-SIZE 26214400250-STARTTLS250-AUTH PLAIN LOGIN250-ENHANCEDSTATUSCODES250 8BITMIME
            CLIENT -> SERVER: AUTH LOGIN
            SMTP -> get_lines(): $data was ""
            bl abla
            CLIENT -> SERVER: 
            CLIENT -> SERVER: .
            SMTP -> get_lines(): $data was ""
            SMTP -> get_lines(): $str is "250 2.0.0 Ok: queued as D1D682A0B20"
            SMTP -> get_lines(): $data is "250 2.0.0 Ok: queued as D1D682A0B20"
            SERVER -> CLIENT: 250 2.0.0 Ok: queued as D1D682A0B20
            CLIENT -> SERVER: QUIT
            SMTP -> get_lines(): $data was ""
            SMTP -> get_lines(): $str is "221 2.0.0 Bye"
            SMTP -> get_lines(): $data is "221 2.0.0 Bye"
            SERVER -> CLIENT: 221 2.0.0 Bye
            Connection: closed