Email spam is a subset of spam that involves nearly identical messages sent to numerous
recipients by Email. Spam is quite dangerous because there might be some viruses that will destroy your computer or any electronics used to check your Email thats why spam have an alternative name which is called junk mail because you don't need it especially when there is virus.
Some computer operators use spam to destroy computers. they send viruses to destroy the computer so that the people will pay extra money to repair it. Some also give spam like to encourage you to donate or pay extra money. Those are some example of Email spam.
Other than spam, there is also phishing. Phishing is a process of attempting to acquire sensitive information such as usernames, passwords and credit cards details. Phishing is usually carried out by Email, letter or instant messaging. Phishing tricks another person into paying extra money by saying to pay tax or ask you to gamble your money.