我已经开始收到主题为“"Mail delivery failed: returning message to sender"我尚未发送的电子邮件”的电子邮件。我在我的域matos-sorge.com（linode）上托管自己的邮件服务器，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：
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:
[email protected]
(generated from [email protected])
mailbox is full: retry timeout exceeded
------ This is a copy of the message, including all the headers. ------
Return-path: <[email protected]> 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
<[email protected]>) id 1WkK88-001FK5-6e for
[email protected]; Wed, 14 May 2014 00:20:59 +0300 From:
<[email protected]> To: <[email protected]> Subject:
regional Asistent manager Date: 13 May 2014 05:42:50 -0800 Message-ID:
<[email protected]> 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 [email protected] pentru a primi mai multe informatii. Cu
respect,HR Manager
我从没尝试发送此消息。
我的邮件服务器使用的是 postfix + dovecot，但我远不是专业的网络管理员。我如何确保我的服务器不会被用于发送垃圾邮件。如果没有，为什么我会收到这些消息？