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  <title>Spam Filter ISP Forums : Blocking img src=cid messages</title>
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  <description><![CDATA[This is an XML content feed of; Spam Filter ISP Forums : Spam Filter ISP Support : Blocking img src=cid messages]]></description>
  <pubDate>Thu, 12 Mar 2026 22:37:31 +0000</pubDate>
  <lastBuildDate>Mon, 10 Jul 2006 13:39:12 +0000</lastBuildDate>
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   <title><![CDATA[Spam Filter ISP Forums]]></title>
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   <title><![CDATA[Blocking img src=cid messages : I was using the follwing RegEx...]]></title>
   <link>https://www.logsat.com/spamfilter/forums/forum_posts.asp?TID=5379&amp;PID=8484&amp;title=blocking-img-srccid-messages#8484</link>
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    <![CDATA[<strong>Author:</strong> <a href="https://www.logsat.com/spamfilter/forums/member_profile.asp?PF=251">MokiTheGeek</a><br /><strong>Subject:</strong> 5379<br /><strong>Posted:</strong> 10 July 2006 at 1:39pm<br /><br />I was using the follwing RegEx that was working great but found too many newsletters and community sites that triggered false positives by including embedded images within their mail.<br /><br />Found several SPAM that tried to get through by breaking up the parts of the IMG tag so I made it look for many characters as long as it didn't run into the start of another tag.<br /><br />Use it if you like:<br />(&lt;img\x20)(.*?)(cid:&#091;^&lt;&#093;*)(&gt;)]]>
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   <pubDate>Mon, 10 Jul 2006 13:39:12 +0000</pubDate>
   <guid isPermaLink="true">https://www.logsat.com/spamfilter/forums/forum_posts.asp?TID=5379&amp;PID=8484&amp;title=blocking-img-srccid-messages#8484</guid>
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   <title><![CDATA[Blocking img src=cid messages : I think the spammers have programmed...]]></title>
   <link>https://www.logsat.com/spamfilter/forums/forum_posts.asp?TID=5379&amp;PID=8477&amp;title=blocking-img-srccid-messages#8477</link>
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    <![CDATA[<strong>Author:</strong> <a href="https://www.logsat.com/spamfilter/forums/member_profile.asp?PF=2">Guests</a><br /><strong>Subject:</strong> 5379<br /><strong>Posted:</strong> 08 July 2006 at 9:25am<br /><br /><P><SPAN style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Verdana">I think the spammers have programmed MS Office into being an automated spam generator. These messages seem to be created by converting text into a .gif file that is split into smaller .gif files and re-assembled in MS Word. <?:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></P><P><SPAN style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Verdana">When you view the email html you don’t see the attached document or images only cid: references to the original document. <o:p></o:p></SPAN></P><P><SPAN style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Verdana">If Word is the default mail editor in Outlook, you can click reply and are then able to select the individual image elements. If you copy the entire document (ctrl-a, ctrl-c) you can paste it into MS FrontPage and see the original html produced by Word. The images are embedded in the original Word document and referenced by the Outlook as src=cid: So you never see the original message in Outlook. Surprisingly Outlook does not indicate that the message/images are actually an attachment. Also Outlooks filters&nbsp;do not seem look at the html so you can't filter the src=cid. <o:p></o:p></SPAN></P><P><SPAN style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Verdana">Unless someone knows of a MS solution, it appears that a third party program will have to be used by Outlook users.</SPAN></P>]]>
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   <pubDate>Sat, 08 Jul 2006 09:25:22 +0000</pubDate>
   <guid isPermaLink="true">https://www.logsat.com/spamfilter/forums/forum_posts.asp?TID=5379&amp;PID=8477&amp;title=blocking-img-srccid-messages#8477</guid>
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   <title><![CDATA[Blocking img src=cid messages : thats interesting Greg...so just...]]></title>
   <link>https://www.logsat.com/spamfilter/forums/forum_posts.asp?TID=5379&amp;PID=8235&amp;title=blocking-img-srccid-messages#8235</link>
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    <![CDATA[<strong>Author:</strong> <a href="https://www.logsat.com/spamfilter/forums/member_profile.asp?PF=140">MartinC</a><br /><strong>Subject:</strong> 5379<br /><strong>Posted:</strong> 14 June 2006 at 5:14am<br /><br />thats interesting Greg...<br><br>so just going for the first line of html before the cid information...<br><br>like this one I just got with &lt;DIV&gt;&lt;FONT face=Arial size=2&gt;&lt;IMG alt="" hspace=0 then a new line and starts<br>src=cid:....<br><br>I've seen people with thunderbird doing a src=cid now with a business card attachment so you do have to be a bit careful.<br><br>the big flaw to us talking about this is that we are No1 on Google searching for "blocking src=cid". :)<br>]]>
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   <pubDate>Wed, 14 Jun 2006 05:14:00 +0000</pubDate>
   <guid isPermaLink="true">https://www.logsat.com/spamfilter/forums/forum_posts.asp?TID=5379&amp;PID=8235&amp;title=blocking-img-srccid-messages#8235</guid>
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   <title><![CDATA[Blocking img src=cid messages : I had a problem with these types...]]></title>
   <link>https://www.logsat.com/spamfilter/forums/forum_posts.asp?TID=5379&amp;PID=8229&amp;title=blocking-img-srccid-messages#8229</link>
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    <![CDATA[<strong>Author:</strong> <a href="https://www.logsat.com/spamfilter/forums/member_profile.asp?PF=236">gbrayut</a><br /><strong>Subject:</strong> 5379<br /><strong>Posted:</strong> 13 June 2006 at 3:37pm<br /><br />I had a problem with these types of messages before, and I was able to remove a lot of them by detecting a pattern in the HTML (ie.. DIV contains Font style and IMG tag... ).<br /><br />Here is an example of the regex I used<br /><br />((?i)div&#091;&lt;&gt;&#093;+font\sface=3DArial\ssize=3D2&#091;&lt;&gt;&#093;+img\salt=3D""\shspace=3D0=20\s+src=3D"cid\:00)<br /><br />The emails in paticular had a common pattern of tags, and the cid always started with 00. If you view the source of the email you may be able to pickup on this type of pattern.]]>
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   <pubDate>Tue, 13 Jun 2006 15:37:27 +0000</pubDate>
   <guid isPermaLink="true">https://www.logsat.com/spamfilter/forums/forum_posts.asp?TID=5379&amp;PID=8229&amp;title=blocking-img-srccid-messages#8229</guid>
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   <title><![CDATA[Blocking img src=cid messages : in the keywords.txt file.I have...]]></title>
   <link>https://www.logsat.com/spamfilter/forums/forum_posts.asp?TID=5379&amp;PID=8140&amp;title=blocking-img-srccid-messages#8140</link>
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    <![CDATA[<strong>Author:</strong> <a href="https://www.logsat.com/spamfilter/forums/member_profile.asp?PF=140">MartinC</a><br /><strong>Subject:</strong> 5379<br /><strong>Posted:</strong> 02 June 2006 at 12:04pm<br /><br />in the keywords.txt file.<br><br>I have a variety of these to block spammers.<br><br>things like this for some of this weeks junk.<br><br>(cid:&#091;\w&#093;{12}\$&#091;\w&#093;{8}\$&#091;\w&#093;{8}@&#091;\w&#093;{4,5}\.&#091;\w&#093;{2,5}")<br><br>]]>
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   <pubDate>Fri, 02 Jun 2006 12:04:19 +0000</pubDate>
   <guid isPermaLink="true">https://www.logsat.com/spamfilter/forums/forum_posts.asp?TID=5379&amp;PID=8140&amp;title=blocking-img-srccid-messages#8140</guid>
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   <title><![CDATA[Blocking img src=cid messages : Where do I put this settinng ???...]]></title>
   <link>https://www.logsat.com/spamfilter/forums/forum_posts.asp?TID=5379&amp;PID=8139&amp;title=blocking-img-srccid-messages#8139</link>
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    <![CDATA[<strong>Author:</strong> <a href="https://www.logsat.com/spamfilter/forums/member_profile.asp?PF=2">Guests</a><br /><strong>Subject:</strong> 5379<br /><strong>Posted:</strong> 02 June 2006 at 11:55am<br /><br />Where do I put this settinng ???]]>
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   <pubDate>Fri, 02 Jun 2006 11:55:00 +0000</pubDate>
   <guid isPermaLink="true">https://www.logsat.com/spamfilter/forums/forum_posts.asp?TID=5379&amp;PID=8139&amp;title=blocking-img-srccid-messages#8139</guid>
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   <title><![CDATA[Blocking img src=cid messages : why does it matter?simple - because...]]></title>
   <link>https://www.logsat.com/spamfilter/forums/forum_posts.asp?TID=5379&amp;PID=8129&amp;title=blocking-img-srccid-messages#8129</link>
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    <![CDATA[<strong>Author:</strong> <a href="https://www.logsat.com/spamfilter/forums/member_profile.asp?PF=140">MartinC</a><br /><strong>Subject:</strong> 5379<br /><strong>Posted:</strong> 01 June 2006 at 4:31am<br /><br />why does it matter?<br><br>simple - because there are some valid src=cid formats.<br><br>spammers tend to use badly formatted ones so easier to block.<br><br>I've not seen many programs do it, but have seen some false positives from standard email clients.<br><br>]]>
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   <pubDate>Thu, 01 Jun 2006 04:31:37 +0000</pubDate>
   <guid isPermaLink="true">https://www.logsat.com/spamfilter/forums/forum_posts.asp?TID=5379&amp;PID=8129&amp;title=blocking-img-srccid-messages#8129</guid>
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   <title><![CDATA[Blocking img src=cid messages :   MartinC wrote:  Ken Bour wrote: Here...]]></title>
   <link>https://www.logsat.com/spamfilter/forums/forum_posts.asp?TID=5379&amp;PID=8126&amp;title=blocking-img-srccid-messages#8126</link>
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    <![CDATA[<strong>Author:</strong> <a href="https://www.logsat.com/spamfilter/forums/member_profile.asp?PF=2">Guests</a><br /><strong>Subject:</strong> 5379<br /><strong>Posted:</strong> 01 June 2006 at 12:28am<br /><br /><table width="99%"><tr><td class="BBquote"><img src="forum_images/quote_box.png" title="Originally posted by MartinC" alt="Originally posted by MartinC" style="vertical-align: text-bottom;" /> <strong>MartinC wrote:</strong><br /><br /><table width="99%"><tr><td class="BBquote"><img src="forum_images/quote_box.png" title="Originally posted by Ken Bour" alt="Originally posted by Ken Bour" style="vertical-align: text-bottom;" /> <strong>Ken Bour wrote:</strong><br /><br /><P>Here is the regex that I am using to block these messages:</P><P>src\=(\"c|c)id\:</P><P></td></tr></table><BR><BR>thats a bit vague to be honest, blocks all src=cid.<BR><BR>I ended up putting in something a bit more specific.<BR><BR>(img src=cid:&#091;a-zA-Z0-9&#093;{16,20})<BR><BR>you can vary the numbers to whatever you want, 32,32 or whatever.<BR></td></tr></table> </P><P>Why does it even matter what comes after the cid:?&nbsp; If the message contains the match from the first regex, then it should be canned.</P><P>I do see a flaw in the first regex, if there is a newline character before or after the "=" then it won't match.</P>]]>
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   <pubDate>Thu, 01 Jun 2006 00:28:41 +0000</pubDate>
   <guid isPermaLink="true">https://www.logsat.com/spamfilter/forums/forum_posts.asp?TID=5379&amp;PID=8126&amp;title=blocking-img-srccid-messages#8126</guid>
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   <title><![CDATA[Blocking img src=cid messages :   Marco wrote: If only the bill...]]></title>
   <link>https://www.logsat.com/spamfilter/forums/forum_posts.asp?TID=5379&amp;PID=6957&amp;title=blocking-img-srccid-messages#6957</link>
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    <![CDATA[<strong>Author:</strong> <a href="https://www.logsat.com/spamfilter/forums/member_profile.asp?PF=2">Guests</a><br /><strong>Subject:</strong> 5379<br /><strong>Posted:</strong> 14 December 2005 at 3:11pm<br /><br /><table width="99%"><tr><td class="BBquote"><img src="forum_images/quote_box.png" title="Originally posted by Marco" alt="Originally posted by Marco" style="vertical-align: text-bottom;" /> <strong>Marco wrote:</strong><br /><br /><P>If only the bill gates' of this world would issue rewards on the heads of virus programmers, "wanted, dead or alive, $$$$$$ for the one that....." etc etc.</P><P>Sounds funny eh? but you think about it... lets put a bounty on the head of the ones that created the latest wave of spamming viruses of, let's say, $200,000.</P><P>I mean, thats peanuts for Bill, and seeing his OS is mostly responsible for all the crap out there it seems fair to me he should be the one to pick up the tab.</P><P>With such an insentive i can allmost guarantee success in bringing the virus-geek(s) to justice. (i'd rather see them shot on the spot btw. <IMG src="https://www.logsat.com/spamfilter/forums/smileys/smiley1.gif" border="0">).</P><P>The zombie networks are beeing used for all sorts of illegal practises, only one of the 'features' is sending spam,&nbsp;the virus programmers made this all happen, they should be dealt with radically and decisively.</P><P>sorry, just need to vent sometimes <IMG src="https://www.logsat.com/spamfilter/forums/smileys/smiley1.gif" border="0"></P><P></td></tr></table> </P><P>I agree whole heartidly, LOL.&nbsp; I think we should enfoce a law that I saw on the old 80's show, Max Headroom.&nbsp; If you crashed the net in the world of Max Headroom, it was a capital punishment offense!&nbsp; Surely under that train of thought, severly slowing down parts of the net would deserve a good caining.</P>]]>
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   <pubDate>Wed, 14 Dec 2005 15:11:56 +0000</pubDate>
   <guid isPermaLink="true">https://www.logsat.com/spamfilter/forums/forum_posts.asp?TID=5379&amp;PID=6957&amp;title=blocking-img-srccid-messages#6957</guid>
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   <title><![CDATA[Blocking img src=cid messages : Another pet peeve of mine with...]]></title>
   <link>https://www.logsat.com/spamfilter/forums/forum_posts.asp?TID=5379&amp;PID=6956&amp;title=blocking-img-srccid-messages#6956</link>
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    <![CDATA[<strong>Author:</strong> <a href="https://www.logsat.com/spamfilter/forums/member_profile.asp?PF=2">Guests</a><br /><strong>Subject:</strong> 5379<br /><strong>Posted:</strong> 14 December 2005 at 3:05pm<br /><br /><P>Another pet peeve of mine with newsletters and some shopping carts is when the use the recipients email address as the from address in the emails they are sending from their own mail servers.</P><P>We reject emails that fail SPF checking, including our own domains.</P>]]>
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   <pubDate>Wed, 14 Dec 2005 15:05:22 +0000</pubDate>
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