Spam/en
Contenido
Spam (emails)
Spam messages are those emails we recieve without our permission, in other words, unwanted messages from unknown. In general, the purpose of spam is advertising. This is sent in large quantities to different users, or specific user. There are also spam with massive purposes, such as harming companies servers causing blockages with the vast number of e-waste, or embedding viruses in email content, thus when the user opens the mail, the viruses attack his system.
Filtering spam
Spam can not be completely eradicated because some of these emails may be important to the user. However, there are mechanisms that help us to filter spam, for example classifying them into the following types:
According to the message content:
These filters analyze the content of the emails to determine if the content is suspect. They look for specific words (the spamwords) or words that hide the spamwords. They also analyze the links pointing to other websites.
According to the message source:
The essence of this filter is the reputation of the issuer. This reputation is one or several scores associated with the identification of the sender, which is determined by the sending IP address and domain name used.
Based on SMTP
This filter uses the SMTP technique, which is a set of rules that describe how to send and receive an email, using this method we get correctly identify the sender and thus ensure verification.
Based on the user
This filter requires manual user intervention. Users add the IP addresses and domain names suspects to the blacklist. In this way the filter identifies them as spam.
