Plesk/MailEnable中继错误

Question

我有问题，中继SMTP电子邮件到远程域在MailEnable，并需要一些帮助，以确定我到底是在服务器设置中遗漏了什么。

直到昨天我在服务器的DNS设置中添加了SPF记录之前，我的安装程序实际上一直工作正常。然后从昨晚开始(下一次系统试图发送自动电子邮件)，发送到远程地址的电子邮件开始失败。据我所知，我正在SMTP调用的入站部分上进行身份验证，但是当它试图连接出站以将消息发送到另一台服务器时，它的行为就好像我还没有进行身份验证一样。

背景:这是我自己的服务器，从一家托管公司租来的。我可以访问IIS/Plesk/MailEnable中站点的所有设置。每当我的自定义VB.NET应用程序试图发送一封电子邮件到我自己域名上的另一个地址时，它就能正常工作。每当我的应用程序试图将相同的电子邮件发送到远程域上的地址时，我都会收到一封来自POSTMASTER@mydomain.com的电子邮件，内容如下：

MailEnable: Message could not be delivered to some recipients.
The following recipient(s) could not be reached:

    Recipient: [SMTP:user@otherdomain.com]
    Reason: 551 This mail server requires authentication before sending mail from a locally hosted domain. Please reconfigure your mail client to authenticate before sending mail.

我编写了一个简单的VB.NET测试程序来尝试调试：

    Dim replyTo As New System.Net.Mail.MailAddress("no-reply@mydomain.com", "MyUser")
    Dim subject As String = "Test subject"
    Dim SendTo As String = "user@otherdomain.com"
    Dim body As String = "This is the email."

    Dim message As New System.Net.Mail.MailMessage
    message.From = New System.Net.Mail.MailAddress("no-reply@mydomain.com", "MyUser")
    message.ReplyToList.Add(replyTo)
    message.BodyEncoding = System.Text.Encoding.ASCII
    message.IsBodyHtml = True
    message.Subject = subject
    message.Bcc.Add("mydomainBCC@mydomain.com")
    message.Body = body

    Dim smtp As New System.Net.Mail.SmtpClient("mydomain.com")
    Dim smtpCredential As System.Net.NetworkCredential = New System.Net.NetworkCredential("no-reply@mydomain.com", "password")
    smtp.UseDefaultCredentials = False
    smtp.Credentials = smtpCredential
    smtp.Port = 587
    smtp.Send(message)

在MailEnable中，我有：

• 激活端口587，在允许通过端口提交之前，选中需要身份验证的框。同样，当我发送到一个地址@mydomain.com时，上面的程序可以工作(通过端口587)，但是对于发送到@otherdomain.com的任何东西仍然失败。
• 在Relay选项卡下，为127.0.0.1 (内部网络IP )中的每个选项添加“允许特权IP范围中继”选项中的条目。 服务器的地址和服务器的外部IP地址。(允许通过身份验证的用户中继的选项已经检查并仍被选中)

为了完整起见，以下是昨天在DNS中设置的SPF记录：

v=spf1 a mx ipv4:75.XX.XX.XX include:_spf.google.com -all

MailEnable还在服务器的根驱动器上创建了一个名为SMTP- in -TOP.TXT的文件，该文件记录了传入的身份验证的最高计数，我在该文件中看到了所有尝试计数的内容：

Recent Top Users    Authentications During Previous Hour
no-reply@mydomain.com   4

最后，下面是来自MailEnable的活动和调试日志，显示了一次事务尝试：

活动：

09/01/13 15:07:26   SMTP-IN 5300BA9154CC413AAD202DE4FBA6CB71.MAI    596 75.XX.XX.XX         220 mydomain.com ESMTP MailEnable Service, Version: 7.0-- ready at 09/01/13 15:07:26    0   0   
09/01/13 15:07:26   SMTP-IN 5300BA9154CC413AAD202DE4FBA6CB71.MAI    596 75.XX.XX.XX EHLO    EHLO mydomain-web-01    250-mydomain.com [75.XX.XX.XX], this server offers 4 extensions 127 21  
09/01/13 15:07:26   SMTP-IN 5300BA9154CC413AAD202DE4FBA6CB71.MAI    596 75.XX.XX.XX AUTH    {blank} 334 UGFzc3dvcmQ6    18  41  no-reply@mydomain.com
09/01/13 15:07:26   SMTP-IN 5300BA9154CC413AAD202DE4FBA6CB71.MAI    596 75.XX.XX.XX AUTH    d29iVFY=    235 Authenticated   19  10  no-reply@mydomain.com
09/01/13 15:07:26   SMTP-IN 5300BA9154CC413AAD202DE4FBA6CB71.MAI    596 75.XX.XX.XX MAIL    MAIL FROM:<no-reply@mydomain.com>   250 Requested mail action okay, completed   43  34  no-reply@mydomain.com
09/01/13 15:07:26   SMTP-IN 5300BA9154CC413AAD202DE4FBA6CB71.MAI    596 75.XX.XX.XX RCPT    RCPT TO:<adam.taylor@otherdomain.com>   250 Requested mail action okay, completed   43  36  no-reply@mydomain.com
09/01/13 15:07:26   SMTP-IN 5300BA9154CC413AAD202DE4FBA6CB71.MAI    596 75.XX.XX.XX RCPT    RCPT TO:<mydomainBCC@mydomain.com>  250 Requested mail action okay, completed   43  34  no-reply@mydomain.com
09/01/13 15:07:26   SMTP-IN 5300BA9154CC413AAD202DE4FBA6CB71.MAI    596 75.XX.XX.XX DATA    DATA    354 Start mail input; end with <CRLF>.<CRLF>    46  6   no-reply@mydomain.com
09/01/13 15:07:27   SMTP-OU D65C7059FE274FBCBA296953ABA4221F.MAI    780 50.XX.XX.XX CONN        220 recipientserver.com ESMTP MailEnable Service, Version: 6.53-- ready at 09/01/13 15:07:26    0   86  
09/01/13 15:07:27   SMTP-OU D65C7059FE274FBCBA296953ABA4221F.MAI    780 50.XX.XX.XX EHLO    EHLO mydomain.com   250-recipientserver.com [75.XX.XX.XX], this server offers 4 extensions  18  127 
09/01/13 15:07:27   SMTP-OU D65C7059FE274FBCBA296953ABA4221F.MAI    780 50.XX.XX.XX MAIL    MAIL FROM:<no-reply@mydomain.com> SIZE=423  551 This mail server requires authentication before sending mail from a locally hosted domain. Please reconfigure your mail client to authenticate before sending mail. 43  169 
09/01/13 15:07:27   SMTP-OU D65C7059FE274FBCBA296953ABA4221F.MAI    780 50.XX.XX.XX QUIT    QUIT    221 Service closing transmission channel    6   42  
09/01/13 15:07:28   SMTP-IN 8E182A43292745538949A1160E407982.MAI    780 127.0.0.1           220 mydomain.com ESMTP MailEnable Service, Version: 7.0-- ready at 09/01/13 15:07:28    0   0   
09/01/13 15:07:28   SMTP-OU D65C7059FE274FBCBA296953ABA4221F.MAI    576 127.0.0.1   CONN        220 mydomain.com ESMTP MailEnable Service, Version: 7.0-- ready at 09/01/13 15:07:28    0   85  
09/01/13 15:07:28   SMTP-IN 8E182A43292745538949A1160E407982.MAI    780 127.0.0.1   EHLO    EHLO mydomain.com   250-mydomain.com [127.0.0.1], this server offers 4 extensions   123 18  
09/01/13 15:07:28   SMTP-OU D65C7059FE274FBCBA296953ABA4221F.MAI    576 127.0.0.1   EHLO    EHLO mydomain.com   250-mydomain.com [127.0.0.1], this server offers 4 extensions   18  123 
09/01/13 15:07:28   SMTP-IN 8E182A43292745538949A1160E407982.MAI    780 127.0.0.1   MAIL    MAIL FROM:<> SIZE=1052  250 Requested mail action okay, completed   43  24  
09/01/13 15:07:28   SMTP-OU D65C7059FE274FBCBA296953ABA4221F.MAI    576 127.0.0.1   MAIL    MAIL FROM:<> SIZE=1052  250 Requested mail action okay, completed   24  43  
09/01/13 15:07:28   SMTP-IN 8E182A43292745538949A1160E407982.MAI    780 127.0.0.1   RCPT    RCPT TO:<no-reply@mydomain.com> 250 Requested mail action okay, completed   43  32  
09/01/13 15:07:28   SMTP-OU D65C7059FE274FBCBA296953ABA4221F.MAI    576 127.0.0.1   RCPT    RCPT TO:<no-reply@mydomain.com> 250 Requested mail action okay, completed   32  43  
09/01/13 15:07:28   SMTP-IN 8E182A43292745538949A1160E407982.MAI    780 127.0.0.1   DATA    DATA    354 Start mail input; end with <CRLF>.<CRLF>    46  6   
09/01/13 15:07:28   SMTP-OU D65C7059FE274FBCBA296953ABA4221F.MAI    576 127.0.0.1   DATA    DATA    354 Start mail input; end with <CRLF>.<CRLF>    6   46  
09/01/13 15:07:28   SMTP-OU D65C7059FE274FBCBA296953ABA4221F.MAI    576 127.0.0.1   DATE        250 Requested mail action okay, completed   1063    43  
09/01/13 15:07:28   SMTP-IN 05D1026706304C7F941CD6348057CC71.MAI    780 127.0.0.1   QUIT    QUIT    221 Service closing transmission channel    42  6   
09/01/13 15:07:28   SMTP-OU D65C7059FE274FBCBA296953ABA4221F.MAI    576 127.0.0.1   QUIT    QUIT    221 Service closing transmission channel    6   42  

调试：

09/01/13 15:07:26   ME-I0135: Authenticating User:no-reply@mydomain.com using Authentication Provider Credentials
09/01/13 15:07:26   ME-I0107: [596] Relay Granted: Sender IP (75.xx.xx.xx) is within an authorized IP range.
09/01/13 15:07:26   ME-I0101: [596] Local Delivery: Address ([SMTP:mydomainBCC@mydomain.com]) is local.
09/01/13 15:07:26   ME-I0149: [596] 5300BA9154CC413AAD202DE4FBA6CB71.MAI was received successfully and delivery thread was initiated
09/01/13 15:07:26   ME-E0070: (recv) socket [596] error during [DATA] command from host 75.xx.xx.xx. Socket was disconnected - Error: (10054)
09/01/13 15:07:26   ME-I0074: [596] (Debug) End of conversation
09/01/13 15:07:27   ME-I0018: [2B8847ABCC1242EDBF3417D32DA6DB59.MAI] Outbound message from ([SMTP:no-reply@mydomain.com]) requeued as [D65C7059FE274FBCBA296953ABA4221F.MAI] to the target domain [otherdomain.com]
09/01/13 15:07:27   ME-I0123: Domain [otherdomain.com] has MX list [mail.otherdomain.com]
09/01/13 15:07:27   ME-I0026: [D65C7059FE274FBCBA296953ABA4221F.MAI] Sending message
09/01/13 15:07:27   ME-IXXXX: [D65C7059FE274FBCBA296953ABA4221F.MAI] DNS resolved to the following record: IP Address=50.XX.XX.XX, Family=2, Type=1, Protocol=6
09/01/13 15:07:27   ME-IXXXX: [D65C7059FE274FBCBA296953ABA4221F.MAI] Remote server returned a response indicating a permanent error. Server Response: (551 This mail server requires authentication before sending mail from a locally hosted domain. Please reconfigure your mail client to authenticate before sending mail.**)
09/01/13 15:07:27   ME-E0036: [D65C7059FE274FBCBA296953ABA4221F.MAI] MAIL FROM command Failed.
09/01/13 15:07:27   ME-E0008: [D65C7059FE274FBCBA296953ABA4221F.MAI] Outbound, could not send the command to the server (error 10038).
09/01/13 15:07:27   ME-E0060: [D65C7059FE274FBCBA296953ABA4221F.MAI] - Message could not be delivered to target domain (otherdomain.com). Message returned to Sender.
09/01/13 15:07:28   ME-I0119: Domain [mydomain.com] has used local loopback address [127.0.0.1] because it is hosted locally.
09/01/13 15:07:28   ME-I0026: [D65C7059FE274FBCBA296953ABA4221F.MAI] Sending message
09/01/13 15:07:28   ME-IXXXX: [D65C7059FE274FBCBA296953ABA4221F.MAI] DNS resolved to the following record: IP Address=127.0.0.1, Family=2, Type=1, Protocol=0
09/01/13 15:07:28   ME-I0101: [780] Local Delivery: Address ([SMTP:no-reply@mydomain.com]) is local.
09/01/13 15:07:28   ME-I0149: [780] 8E182A43292745538949A1160E407982.MAI was received successfully and delivery thread was initiated
09/01/13 15:07:28   ME-I0049: [D65C7059FE274FBCBA296953ABA4221F.MAI] Send Completed Successfully
09/01/13 15:07:28   ME-I0074: [780] (Debug) End of conversation

Answer 1

好吧，发现问题了。我用来测试问题的“外部”地址实际上是在我们的网站转移到这个专用服务器之前所在的旧服务器上。显然，该服务器上的站点/邮件设置在我们的站点上，一旦我们移出它，就永远不会被删除。因此，当我们的新服务器发送或从我们的新服务器发送到仍然承载在旧服务器上的地址时，旧服务器将电子邮件解释为来自未经身份验证的内部地址。