我有一个网站,该网站需要向客户发送电子邮件以交付他们购买的文件。可靠的电子邮件传递对这项业务至关重要。不幸的是,由于我的MTA的“信誉欠佳”,我的服务器发送的大多数电子邮件都没有传递。这是我的一些示例行mail.log
:
Feb 20 02:40:41 servername postfix/smtp[14580]: 4E30B1100C7: host aspmx.l.google.com[209.85.211.78] said: 421-4.7.0 [174.143.183.26] Our system has detected an unusual amount of 421-4.7.0 unsolicited mail originating from your IP address. To protect our 421-4.7.0 users from spam, mail sent from your IP address has been temporarily 421-4.7.0 blocked. Please visit http://www.google.com/mail/help/bulk_mail.html 421 4.7.0 to review our Bulk Email Senders Guidelines. 10si1216690ywh.92 (in reply to end of DATA command)
Feb 20 12:49:22 servername postfix/smtp[5651]: A86CB1CC0CF: to=<user@domain.com>, relay=mx3.comcast.net[76.96.58.14]:25, delay=55186, delays=55185/0.01/0.93/0, dsn=4.0.0, status=deferred (host mx3.comcast.net[76.96.58.14] refused to talk to me: 554 imta36.westchester.pa.mail.comcast.net comcast 174.143.206.168 found on one or more DNSBLs, see http://help.comcast.net/content/faq/BL000001)
Feb 16 10:50:11 servername postfix/smtp[6931]: 98B94380A1: host mx-in-2.webreus.nl[212.61.252.240] refused to talk to me: 554-mx-in-2.webreus.nl 554-Your access to this mail system has been rejected due to the sending MTA's poor reputation. If you believe that this failure is in error, please contact the intended recipient via alternate means. 554 More information can be found on http://senderbase.org/senderbase_queries/detailhost?search_string=174.143.206.168
Feb 16 10:50:12 servername postfix/smtp[6931]: 98B94380A1: to=<user@domain.com>, relay=mx-in-1.webreus.nl[212.61.10.240]:25, delay=173653, delays=173650/0.22/2.8/0, dsn=4.0.0, status=deferred (host mx-in-1.webreus.nl[212.61.10.240] refused to talk to me: 554-mx-in-1.webreus.nl 554-Your access to this mail system has been rejected due to the sending MTA's poor reputation. If you believe that this failure is in error, please contact the intended recipient via alternate means. 554 More information can be found on http://senderbase.org/senderbase_queries/detailhost?search_string=174.143.206.168)
我已采取步骤尝试改善这种情况:
- 设置反向DNS查找以正常工作
- 为我的域设置SPF记录
- 禁止到我的SMTP服务器的传入连接
- 根据RFC 2822格式化消息
- 永远不要发送未经请求的消息(我从来没有)
我的服务器在Rackspace的云中。IP地址的不良声誉是否有可能是从先前的客户那里继承来的?在过去的一周中已采取了上述一些措施-我是否必须等待情况改善?还有其他我应该做的事情吗?我应该雇用第三方为我发送电子邮件吗?