HOWTO IDENTIFY A SPAM MESSAGE

At this article we show some network concepts about SMTP protocol and examples of messages.

The article is divided into 6 parts to facilitate the understanding and avoid the stress of continuous reading.

It is hoped that the article will be useful for both normal users and "IT experts".

(Only in Portuguese, sorry!)
PART 1
PART 2
PART 3
PART 4
PART 5
PART 6