我未发送的邮件的邮件传递失败

Question

我已经开始收到主题为："Mail delivery failed: returning message to sender"对于我还没有发送的电子邮件的电子邮件。我在我的域matos-sorge.com（一个 linode）中托管我自己的邮件服务器，我有点担心有人使用我的邮件服务器发送垃圾邮件。

我收到的电子邮件如下所示：

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es)
failed:

acoperis@ls12.globehosting.net
  (generated from ppaxylfg510@acoperisexpert.ro)
  mailbox is full: retry timeout exceeded

------ This is a copy of the message, including all the headers. ------

Return-path: <paulo@matos-sorge.com> Received: from [70.45.238.57]
(port=15427 helo=host-70-45-238-57.onelinkpr.net)   by
ls12.globehosting.net with esmtp (Exim 4.80)    (envelope-from
<paulo@matos-sorge.com>)    id 1WkK88-001FK5-6e     for
ppaxylfg510@acoperisexpert.ro; Wed, 14 May 2014 00:20:59 +0300 From:
<paulo@matos-sorge.com> To: <ppaxylfg510@acoperisexpert.ro> Subject:
regional Asistent manager Date: 13 May 2014 05:42:50 -0800 Message-ID:
<002801cf6eb6$056bf74c$152b8580$@matos-sorge.com> MIME-Version: 1.0
Content-Type: text/plain;   charset="ibm852" Content-Transfer-Encoding:
8bit X-Mailer: Microsoft Office Outlook 11 Thread-Index:
Acjpbbuaee0o3789jpbbuaee0o3789== X-MimeOLE: Produced By Microsoft
MimeOLE V6.1.7601.17514 X-Spam-Status: No, score=2.5 X-Spam-Score: 25
X-Spam-Bar: ++ X-Ham-Report: Spam detection software, running on the
system "ls12.globehosting.net", has  identified this incoming email as
possible spam.  The original message  has been attached to this so you
can view it (if it isn't spam) or label  similar future email.  If you
have any questions, see  the administrator of that system for details.
Content preview:  Buna ziua! Noua ne-a placut CV-ul dvs si am hotarat
ca sunteti
  interesati sa lucrati in compania noastra. Ne specializam in consultare in
  domeniul de management al afacerilor. Activitatea noastra se desfasoara in
  mai multe tari din lume, la fel avem si clienti in Romania. Si in legatura
  cu acest fat,dorim sa marim numarul de membrii echipei noastre. Activitatea
  poate fi deplina sau partiala. Salariu de la 400 pana la 2000 euro lunar.
  [...]     Content analysis details:   (2.5 points, 3.0 required)
  pts rule name              description  ---- ---------------------- --------------------------------------------------
  2.5 URIBL_DBL_SPAM         Contains an URL listed in the DBL blocklist
                           [URIs: myjob-ro.com] X-Spam-Flag: NO

Buna ziua!

Noua ne-a placut CV-ul dvs si am hotarat ca sunteti interesati sa
lucrati in compania noastra. Ne specializam in consultare in domeniul
de management al afacerilor.

Activitatea noastra se desfasoara in mai multe tari din lume, la fel
avem si clienti in Romania. Si in legatura cu acest fat,dorim sa marim
numarul de membrii echipei noastre. Activitatea poate fi deplina sau
partiala. Salariu de la 400 pana la 2000 euro lunar.

Daca sunteti interesati de oferta propusa,va rugam sa scrieti pe
adresa Lizzie@myjob-ro.com pentru a primi mai multe informatii. Cu
respect,HR Manager

我从未尝试发送此消息。

我在我的邮件服务器上使用 postfix + dovecot，但我远不是专业的网络管理员。如何确保我的服务器没有被用于发送垃圾邮件。如果不是，为什么我会收到这些消息？

Answer 1

如果标题中列出的 IP 地址都不属于您的基础设施，您可以放心地忽略这些消息，因为任何人在发送垃圾邮件时都可以使用您的邮件地址，您将收到错误报告（这称为反向散射垃圾邮件）。

您可以通过将SPF和/或DKIM添加到您的邮件基础结构来稍微减少此问题，因为随着垃圾邮件的增加，使用您的地址从非法来源发送的邮件将被整理出来的机会。