There are lots of different kinds of spam. Some of them are already known, others are just inventing. It's because the spam market always needs a new discoveries. Because there is a big opponent who is always fighting against him. It's not just different spam-filters. It's also a human's psychology. Today the spam has became so natural phenomenon, that lots of real and full messages are quoted as the spam because of mistaken design. Quoted by the human, but not with a robot.
So, this is it. Yesterday I have received such surprising letter:
This is the Postfix program at host ***.net.
I'm sorry to have to inform you that the message returned
below could not be delivered to one or more destinations.
For further assistance, please send mail to
If you do so, please include this problem report. You can
delete your own text from the message returned below.
Below is the text of the letter, as though was sent by myself. Very good designed advertisement letter. Of course my first thought was that someone is sending the spam and hiding by my address. But I have received only one such kind of message, what if it was sent in the industrial scales, Mail Delivery System would write me a few thousand times...
So, I think that a letter which was sent from Mail Delivery System - is a spam. The spam which has the aim of forcing the user to click on the link in a "phrase" of "undelivered" letter. Are you interested what was undelivered from you....as a matter of fact it's not from you at all....
I think it's very highly sensitive and resourceful thing.