Email Bounces Back with “unrouteable mail domain” Error电子邮件反弹与“ unrouteable的邮件域”的错误
At your own mail server provided by the web hosting service, where the mail transfer agent (MTA) is normally Exim or Sendmail, there may be email sending and delivery error where emails include those auto-generated by PHP scripts bounce back to the sender’s account by the MTA itself.在您自己的邮件服务器所提供的网页主机服务，邮件传输代理（ MTA ）是通常的exim或sendmail ，可能会有电子邮件发送和交付错误的地方的电子邮件，包括那些自动生成由PHP脚本退回给发件人' s帐户由MTA的本身。 The problem normally happens during the initial setup of email server, or after you have done some changes to system or web host configuration.这个问题通常发生在初始安装的电子邮件伺服器，或之后，你做了一些更改系统或网页主机配置。 And even emails send to well known domains such as Gmail.com, Yahoo.com and Hotmail.com are rejected.甚至电子邮件传送到著名的域名如gmail.com ， yahoo.com或hotmail.com被拒绝。 The following text message will append to the bounced email:以下文字讯息将附加到退回的电子邮件：
Mail delivery failed: returning message to sender 邮件派递服务失败：返回的信息，发件人
A message that you sent could not be delivered to one or more of its一条消息，您发送的无法交付的一个或多个其
recipients.受助人。 This is a permanent error.这是一个永久性的错误。 The following address(es) failed:以下地址（安老服务）失败：
xxx@hotmail.com
unrouteable mail domain “hotmail.com” unrouteable的邮件域“ hotmail.com ”
The unrouteable mail domain error message is a very general error message of mail server which could means a lot of things and possible causes of error.该unrouteable的邮件域的错误讯息是一个很一般的错误讯息的邮件服务器可以指很多事情及其可能原因的错误。 List below is a few common causes and its possible solution.下面的列表是几个常见的原因及其可能的解决办法。
If you’re using cPanel, the “unrouteable mail domain” error may occur when MTA hit the limit on the maximum number of e-mails sent out per hour.如果您使用的cPanel ， “ unrouteable的邮件域”的错误时，可能会出现的MTA击中的限制，最多的电子邮件发出每小时。 The setting is configured at Tweak Settings section of cPanel WebHost Manager (WHM).设置是设定在调整设置一节的cPanel网页主机服务经理（的WHM ） 。 Look for the option of “The maximum each domain can send out per hour (0 is unlimited)”.寻找的选择“最高，每个网域可以发送出每小时（ 0是无限的） ” 。 As mentioned, set it to 0 for unlimted emails sending.如上所述，将它设置为0 unlimted电子邮件发送。 If you’re using shared hosting, you can change this setting, but you can request support from hosting company or just wait out the hour.如果您使用的共同主办，您可以更改此设置，但是您可以要求支持从托管公司或只是等待了一个小时。 This limit is in place to curb any spam attacks that might take place on the servers.这个限制是在地方，以遏止任何垃圾邮件攻击可能发生在服务器。
Another possible cause for “unrouteable mail domain” problem when sending mail generated by PHP scripts is the security feature of the web host and Apache HTTPD PHP module.另一个可能的原因为“ unrouteable的邮件域”问题时，发送邮件所产生的PHP脚本是安全功能的网页主机和Apache的httpd PHP模块。 In cPanel, it’s possible to set “nobody” account which Apache is running is not allowed to send emails to remote or external email addresses.在的cPanel ，有可能会订定“没有人”的帐户， Apache是运行是不容许发送电子邮件到偏远或外部的电子邮件地址。 If the setting is enabled, the MTA will bounce the e-mails if PHPSuexec or/and Suexec is turned off and disabled.如果设置已启用， MTA将退回的电子邮件，如果phpsuexec和/或suexec是关闭和残疾人。 The resolution or solution to this problem is to unselect the “Prevent the user “nobody” from sending out mail to remote addresses (PHP and CGI scripts generally run as nobody if you are not using PHPSuexec and Suexec respectively.)” setting in Tweak Settings section of cPanel WHM.该决议或要解决这个问题是要取消“防止用户”没有人“从发送电子邮件到偏远的地址（ PHP和CGI脚本一般运行没有人如果您使用的不是phpsuexec和suexec分别） ”设置，调整设置一节的cPanel的WHM 。 If you’re on shared hosting server and with no access to WHM, again you have to contact the hosting service provider for support and resolution.如果您对共享主机服务器和无法获得的WHM ，再次你有联系的托管服务供应商的支持和决议。 You can also try to modify the PHP scripts to send emails using SMTP with authentication.您也可以尝试修改PHP脚本发送电子邮件的SMTP使用与验证。
The unable to send email problem may also related to DNS configuration error.该无法发送电子邮件的问题，也可能有关的DNS配置错误。 The originating mail server for a domain must have an MX record associated with it, which then also need to have a A record in the DNS to resolve to the correct IP address.原始的邮件服务器为网域必须有一个MX记录，与此相关，然后还需要有一个记录，在DNS来解析，以正确的IP地址。 Beside, Internet Service Providers require all incoming email to be sent from a server with a reverse DNS (PTR) record.旁边，互联网服务供应商，要求所有传入的电子邮件将被送到从服务器与反向DNS （ PTR ）记录。 All these DNS records must be correctly defined.所有这些DNS记录必须正确地界定了。 You can use dig command (for example: dig mx mydomain.com) to verify the MX record, or use third-party websites such as您可以使用挖掘命令（例如：挖的MX mydomain.com ）来验证MX记录，或使用第三方网站，如 dnsstuff.com to check for all DNS entries.检查所有的DNS项目。
The sender’s mail server or recipient’s mail server may also has sender verification turns on, in which if the verification fails, you will have some error like below:发件人的邮件伺服器或收件人的邮件服务器可能也有发件人核查轮流上，在其中如果验证失败，你将有一些错误如下：
Remote SMTP server has rejected address远程SMTP服务器已拒绝地址
550-Verification failed for 550验证失败
If it’s your own mail server MTA that’s rejecting the email, you can temporarily turn off “Verify the existence of email senders” in cPanel WHM under Exim or Sendmail Configuration Editor in Service Configuration section.如果这是您自己的邮件服务器的MTA认为的，拒绝的电子邮件，您可以暂时关闭“验证的存在，电子邮件寄件者”在的cPanel的WHM下，进出口银行或sendmail配置编辑器在服务配置节。 However, the root cause is still related to DNS problem mentioned above as the setting enables check and verify if the MX record of the sender is valid.然而，根本原因仍然是相关的DNS上述问题作为设置，可检查和核实，如果MX记录的发件人是有效的。 So if the mail server unable to route the mails to recipients’ MTA and been rejected with the error, you will need to verify the the DNS entries again, although there is slim chance that the receiving mail server is misconfigured.因此，如果邮件服务器无法路线邮件的收件人' MTA和被拒绝与错误，您将需要验证DNS项再次，虽然有渺茫的机会，接收邮件服务器的错误。
IMPORTANT : This is a machine translated page which is provided "as is" without warranty. 重要说明 ：这是一个机器翻译网页是“按原样”提供的担保。 Machine translation may be difficult to understand.机器翻译可能很难理解。 Please refer to请参阅 original English article英文原版的文章 whenever possible.只要有可能。
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