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we have Postini as a spam filter.
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user is getting a lot of spam with the following content<br />
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&quot;The following recipient(s) could not be reached:<br />
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&nbsp; XXXXXXXX@XXXX.XXXXXX.ru on 8/7/2008 5:32 AM<br />
&nbsp; The e-mail system was unable to deliver the message, but did not report a specific reason. &nbsp;Check the address and try again. &nbsp;If it still fails, contact your system administrator.<br />
&nbsp; &lt;&nbsp;mail.XXXXX.ru #5.0.0&gt;&quot;<br />
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Is this just a flood of spam or could this be a legit problem. The user never sent an email to the address this email mentions.<br />
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Is there something that can or needs to be done besides eliminating this content with a rule?<br />
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(I X'd out the actual address it said because I didn't want to put the real address it says on the interent.)<br />

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user is getting a lot of spam with the following content

"The following recipient(s) could not be reached:

  XXXXXXXX@XXXX.XXXXXX.ru on 8/7/2008 5:32 AM
  The e-mail system was unable to deliver the message, but did not report a specific reason.  Check the address and try again.  If it still fails, contact your system administrator.
  < mail.XXXXX.ru #5.0.0>"


Is this just a flood of spam or could this be a legit problem. The user never sent an email to the address this email mentions.

Is there something that can or needs to be done besides eliminating this content with a rule?

(I X'd out the actual address it said because I didn't want to put the real address it says on the interent.)


spam Subject: ???????????? The following recipient(s) could not be reached:

user is getting a lot of spam with the following content

&quot;The following recipient(s) could not be reached:

  XXXXXXXX@XXXX.XXXXXX.ru on 8/7/2008 5:32 AM
  The e-mail system was unable to deliver the message, but did not report a specific reason.  Check the address and try again.  If it still fails, contact your system administrator.
  &lt; mail.XXXXX.ru #5.0.0&gt;&quot;


Is this just a flood of spam or could this be a legit problem. The user never sent an email to the address this email mentions.

Is there something that can or needs to be done besides eliminating this content with a rule?

(I X&#39;d out the actual address it said because I didn&#39;t want to put the real address it says on the interent.)


Operating system security (OS security) is the process of ensuring OS integrity, confidentiality and availability. OS security refers to specified steps or measures used to protect the OS from threats, viruses, worms, malware or remote hacker intrusions. OS security encompasses all preventive-control techniques, which safeguard any computer assets capable of being stolen, edited or deleted if OS security is compromised, including authentication, passwords and threats to systems and programs.

OS Security

Anti-virus software was originally developed to detect and remove computer viruses. However, with the proliferation of other kinds of malware, antivirus software started to provide protection from other computer threats. In particular, modern antivirus software can protect from malicious browser helper objects (BHOs), browser hijackers, ransomware, keyloggers, backdoors, rootkits, trojan horses, worms, malicious layered service providers (LSPs), dialers, fraud tools, adware and spyware. Some products also include protection from other computer threats, such as infected and malicious URLs, spam, scam and phishing attacks, online identity theft (privacy), online banking attacks, social engineering techniques, Advanced Persistent Threat (APT), botnets and DDoS attacks.

Anti-Virus Apps

Various techniques are used to prevent email spam (unsolicited bulk email). No technique is a complete solution to the spam problem, and each has trade-offs between incorrectly rejecting legitimate email (false positives) vs. not rejecting all spam (false negatives) - and the associated costs in time and effort. Anti-spam techniques can be broken into four broad categories: those that require actions by individuals, those that can be automated by email administrators, those that can be automated by email senders and those employed by researchers and law enforcement officials.