Spam, or unwanted e-mails, make up half of all e-mails sent around the world. They are usually meant for adults and can be upsetting for children.

But you don't have to accept it or put up with them.

There is special software which can stop spam getting into your inbox.

Speak to your parents about the software if you are at all worried.

Most internet and e-mail companies, like yahoo and AOL, have some sort of system in place to block spam, and they are working to get better systems all the time.