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Anti-Virus File Attachments

Oftentimes viruses are spread though email. In an effort to prevent our customers from getting an email virus through their email account with us, TreadStar Communications has  anti-virus programs installed on our servers. Of course you should still have anti-virus software installed on your computer and set up to scan emails as well.

Many of these viruses come in email attachements and the purpose of this post is to let you know what types of files often contain malicious software. These file attachements should be blocked by our anti-virus programs but you should also be aware of them. If an incoming email passes through the anti-spam filter and has one of these types of files attached, the email will be delivered to you without the attachment. The attachments are removed from emails before delivery to you and placed in a quarantine area for 30 days. If you wish to receive them you can contact us for retrieval.

The following is a list of file attachments that may be blocked by the service

These are known to be dangerous in almost all cases.

  • .reg Possible Windows registry attack
  • .chm Possible compiled Help file-based virus
  • .cnf Possible SpeedDial attack
  • .hta Possible Microsoft HTML archive attack
  • .ins Possible Microsoft Internet Comm. Settings attack
  • .jse_ Possible Microsoft JScript attack
  • .lnk Possible Eudora *.lnk security hole attack
  • .ma_ Possible Microsoft Access Shortcut attack
  • .pif Possible MS-Dos program shortcut attack
  • .scf Possible Windows Explorer Command attack
  • .sct Possible Microsoft Windows Script Component attack
  • .shb Possible document shortcut attack
  • .shs Possible Shell Scrap Object attack
  • .vbe or .vbs Possible Microsoft Visual Basic script attack
  • .wsc .wsf .wsh Possible Microsoft Windows Script Host attack
  • .xnk Possible Microsoft Exchange Shortcut attack

These are very often used by viruses

  • .com Windows/DOS Executable
  • .exe Windows/DOS Executable

These are very dangerous and have been used to hide viruses

  • .scr Possible virus hidden in a screensaver
  • .bat Possible malicious batch file script
  • .cmd Possible malicious batch file script
  • .cpl Possible malicious control panel item
  • .mhtml Possible Eudora meta-refresh attack

Deny filenames ending with CLSID’s

  • Filename trying to hide its real extension

Deny filenames with lots of contiguous white space in them.

  • Filename contains lots of white space

Deny double file extensions.

  • This catches any hidden filenames. Examples:
    • .txt.pif
    • .doc.pif
    • .txt.exe

How to Design Web Sites for Internet Marketing (part 5)

5. Search Engine Optimization

Search Engine Optimization – the spammers love to sell you SEO services for which they promise the holy grail for a mere pittance and a one-time re-write of your website content.

Most often these programs focus on keyword research (the art of finding the most relevant keyword phrases that consumers search for) and directing you to change your meta tag information to include their recommendations.


Be wary of the spammers. Google is the undisputed search engine champion with about an 85% share of the market. The following quote is from their website:

Amazingly, we get these spam emails too:


I visited your website and noticed that you are not listed in most of the major search engines and directories…”


Reserve the same skepticism for unsolicited email about search engines as you do for “burn fat at night” diet pills or requests to help transfer funds from deposed dictators.

The truth of the matter is that Search Engine Optimization (SEO) is an ongoing process. It is defined as the process of improving the visibility of your website or specific web pages on search engines by way of natural or organic search results. The holy grail being the free listings that appear above the fold on Google.

Comprehensive SEO should include many types of searches such as text, video, audio, image, news and blog, as well as local searches. In addition to the well know search engines such as Google, Yahoo, Bing, and others, you should also pay attention to industry specific search engines. The industry specific search engines are often simply directories where you can list your website for free.

The basic premise of SEO is that we think we know how the search engines choose which site to rank higher for a specific topic or keyword phrase. Unfortunately this is a moving target in that each search engine has its’ own algorithm and they change them at will.

To understand how these algorithms are designed it is important to understand the goal of a search engine. Ultimately search engine websites generate revenue by selling advertising and other products based on the amount of traffic that their search engine generates.

If you think about it… your website does the same thing. The more traffic you generate, the more sales you will have. Well… that is true if your website accurately describes what your traffic is looking for. If you draw traffic looking for women’s shoes and you sell camping equipment… the traffic won’t do you much good.

Google wants to draw traffic to their website – so they must provide you with the product you are looking for. In the case of a search engine, the product is a list of sites that provide ,information or products related to your search criteria. If you search for women’s shoes and Google displays a list of sites that provide camping equipment… you probably would find another search engine.

For Google to be successful, their goal is to provide you with the most relevant websites related to your search criteria. The way that they do this is by reviewing the millions of web pages that comprise the Internet and indexing them to match your criteria. At the most basic level they are only going to recommend pages that are actually about women’s shoes if that is what your search phrase was.

In a recent announcement, Google introduce a major change to their algorithm. From an article published on February 24, 2011 it becomes clear that the content of your website is more important than the keyword phrases loaded up in your meta tags. This is an excerpt from that article:

This update is designed to reduce rankings for low-quality sites—sites which are low-value add for users, copy content from other websites or sites that are just not very useful. At the same time, it will provide better rankings for high-quality sites—sites with original content and information such as research, in-depth reports, thoughtful analysis and so on.

In fact Google announced on September 29, 2009 – – that they do not use the “keywords” meta tag in their web search rankings.

In spite of Google not using the “keywords” meta tag, keyword research is still a valuable part of SEO. Keyword research, if done properly, will give you an accurate picture of what your customers are searching for. The results of this type of research may help you in choosing what to write about as you fill your website with relevant content.

Another element of search engine optimization is the structure of your website. Making it easy for the search engines to quickly understand the focus of your website goes a long well in helping with your page rankings. Broken links, problematic parameters in URLs, sorting parameters, and more are the bane of search engines.

Optimizing your website for success requires a consistent effort to produce relevant and quality content. Whether you choose to do it yourself or in partnership with TreadStar Communications and Marketing, you need to pay attention to your website if you want it to produce customers for your business.