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06-September-2010
Location: Home Page > Articles > 458579308
You won't get a thing from here
It was with some curiosity and patience, that I waited for SPAMbots and Spybots (applications that colect E-mails for Spam) in the MastersHelp database. Not before the end of this first month, they have allready appeared, but for here, they won't take a thing...
SPAMbots and Sysbots are applications that sail the Internet visiting Web sites in the search of E-mails to sell them later. Yes, it's truth, there are those who buys E-mails, to do nothing more than fill the mailboxes of this world trying to sell something or to deceive somebody.
It is difficult to think that there are still some people that do not know what's SPAM, but not to run risks and in summary, it's the e-mail messages that we receive in our email accounts of people who we do not know. When we receive an e-mail of this gender we get curious becuase we do not know the sender. Who is it? Why do I receive this message? Who's this person? Is it a virus? How did they obtained my email? These questions, that cross our thought, much of the times in the speed of the light, get has result, in the majority of the cases, the erasing or opening of the message received. If you are one of those that still opens E-mails not knowing the sender, I hope that you have at least one good antivirus and one good firewall. I believe that much of the times, one opens this E-mails because one desires to know how they have obtained our e-mail, or in the worse hypotheses, because the subject of the e-mail has captivated or intrigued.
Imagine that my email was fatimxuxu@spam.xptoz and that I had placed it (has i did) in this page to allow, for example, that you could send me commentaries to this article. It would make sense! But the fact is that it would be at the mercy of of the applications that "harvest" E-mails for Spam. It would be a question of time until I started to receive messages that I didn't request (notice that that e-mail does not exist).
If in some cases it's a hard task to have that to erase hundreds of not requested messages in our e-mail account, (Portuguese example mail.pt, where stubbornly they don't make available a gratuitous solution so sort it out) truth is also that tools exist that in help them to block or to inhibit the access of Spam in our accounts of email. But what I intend to focar in this article it is the part that interests who however makes Web Sites, allowing to alert the users to me not to leave its email in Web sites that facilitate the harvest of exactly.
How to leave of being friend of these applications?
We go then to the part technique. We can start for suggesting that any available email in its Web Sites does not leave. Impracticable it says? It looks at that it is not of all truth if, for example, to substitute its contact of email in the Web site for a form. This, will allow that its visitors can enter in contact obtain by electrónica and thus she is not risked to receive any Spam. But, and it notices well, that when using the form does not have to use in action of tag form mailto (it sees the tutorial "HTML Tags - Forms" for more information). The fact of the email, to be visualizável in browser does not decide the problem, because robots the code does not see browser but itself that interpreted for this. Thus, the solution passes for using one script server-side (program in the side of the server). After the form filled and sent for the user for the server, this is analyzed and processing, sending the email for itself. It is not visible in browser, nor in the code (thus they order robots to urtigas).
Another solution, this more for who does not have as to use server languages side or still it does not know as or what they are, it is to use Javascript. It notices however, that the Javascript can be desactivado by its users, and thinks I, to be only one question of time until the SPAMbots and Sysbots obtain to give to the return to this solution and spoon its email. But until there, and being about a simpler measure to implant it attempts against in the following Javascript:
< script language="Javascript" type="text/javascript" > < - - to var who = "support"; to var dominio = "Mastershelp.org"; document.write("" + who + "@" + domain +""); /->
Data that the SPAMbots and Sysbots are programs (do not have our eyes), they do not go to get the final result (a valid email). We are to assume that they had looked something as "text arroba text point text" (the format most common it email) and thus, had ignored this code the same not identifying as being a valid email.
Another solution, will be to use Apache the Web Server in its lodging, passes for using the mod_rewrite to prevent that its pages are all analyzed by these robots. An infallible solution is not also this, given that it has tricks to give the return, but has some profits, for example to save width of band. This solution consists of placing the names of the robots in the filing-cabinet htaccess thus preventing that these can analyze our pages being blocked for the Web. server will have the mod_rewrite (its company of lodging consults) will be able to place in the filing-cabinet htaccess the following lines:
Options +FollowSymlinks RewriteEngine On RewriteBase/RewriteCond %{HTTP_USER_AGENT} "NEWT ActiveX; Win32 "RewriteRule. * - [ F,L ]
In this in case that, we are to block the NEWT ActiveX; Win32 (it was what it came first to visit the MastersHelp), exists unhappyly much more. It will have that to have in attention that has robots used for agents as the Google or the Yahoo and believes that these do not have to be blocked. In skill of note, and for who it uses robots.txt, an acknowledgment: They exist robots that they do not respect the filing-cabinet minimamente and they analyze the Web site all, therefore well-taken care of.
Moral of history, prevents to disponibilizar E-mails in its Web Sites, uses forms. Its Web site is intent to who visit, makes questions. When to find things that do not know in its lists of access, look for and question very for strange that it is. In the end of accounts, the war against the Spam will have of being earns, this is my small contribution waits that it helps and he is promise a tutorial one gone deep on this subject.
by André Ferreira in
André Ferreira