SPAM
By B L
Spam
Email from unknown addresses may be Spam, designed to increase your data cost by having too much email in your inbox, see if your address is real, and possibly send viruses. Also, if you reply, the people who sent it now know that your address is a real address, and will start flooding your inbox with e-mails, filling your inbox with annoying emails.
However, spam is very easy to avoid. Spam can be avoided by simply not answering the email, and blocking any emails from that user. Also, if it seems too good to be true, it probably is spam.
Spam looks like this: "WIN A FREE IPAD IF YOU ANSWER THIS EMAIL!!!!"
or: "answer this email and win $1000!!!"