You thought that the pictures of 1x1 px inserted only in spam and advertising? No, it turns out, and serious company Facebook also dabbles in small espionage. However, they are more creative and together with hidden image placed the body of the message and even the . If the user opens a letter in the web interface or program with the display of HTML, this object sends a message to the Facebook server.
One of the users accidentally found in a letter from the company Facebook the following code:
As is known, the was originally intended for implementation in the document of the sound file that is played as a background music. Now no one uses the for its intended purpose.
It turned out that code like Facebook inserts in each letter. As a sound file for the "background music" specify a script on the server Facebook, which fixes the reference to him, and writes the results to a log.
This technique is not something special or prohibited, tracing letters used by many companies for the purpose of marketing is still the 90-ies. So they can analyze the effectiveness of the mailing list, to compare the effectiveness of different options for the header and calculate the exact CTR, i.e. the number of кликнувших on the link in relation to those, who opened the letter.
Moreover, there are 32 other way, how can you keep track of the message recipient. Want to send yourself a test message and check, whether the sender of some result, you can use the service Required Privacy Tester. So you can see how good job your mail provider to the blocking of "espionage". For example, Gmail blocks all, without exception, these types of "tracking" of the content, but the misses the and so that users of the mail service vulnerable to surveillance.
Although such methods of surveillance are considered to be normal among marketers, but all the same rules of network etiquette requires that notice of reply was sent with the consent of the user. Although, who in our time to observe netiquette? The twenty-first century in the yard - people make money
One of the users accidentally found in a letter from the company Facebook the following code:
As is known, the
It turned out that code like Facebook inserts in each letter. As a sound file for the "background music" specify a script on the server Facebook, which fixes the reference to him, and writes the results to a log.
This technique is not something special or prohibited, tracing letters used by many companies for the purpose of marketing is still the 90-ies. So they can analyze the effectiveness of the mailing list, to compare the effectiveness of different options for the header and calculate the exact CTR, i.e. the number of кликнувших on the link in relation to those, who opened the letter.
Moreover, there are 32 other way, how can you keep track of the message recipient. Want to send yourself a test message and check, whether the sender of some result, you can use the service Required Privacy Tester. So you can see how good job your mail provider to the blocking of "espionage". For example, Gmail blocks all, without exception, these types of "tracking" of the content, but the misses the and so that users of the mail service vulnerable to surveillance.
Although such methods of surveillance are considered to be normal among marketers, but all the same rules of network etiquette requires that notice of reply was sent with the consent of the user. Although, who in our time to observe netiquette? The twenty-first century in the yard - people make money
