Most of the email messages sent around the globe these days are spam, in other words – unwelcome messages with different offers or with hyperlinks to malicious software. Not only are such emails irritating, but they also pose a threat to your computer, not to mention that you may get swindled. This is why, plenty of email providers use email filters, which are software apps that keep track of all inbound messages and filter the undesirable ones based on their content – what words an email message includes and how many times they are cited, what web site a specific hyperlink leads to, what outgoing SMTP mail server the email is sent from, etc. Some web hosts also make use of the databases of spam-detecting organizations devoted to providing the most up-to-date info about undesirable emails, to make certain that their clients won’t get any email in their inbox that is not supposed to be there.