Most of the email messages sent around the globe these days are spam, i.e. unrequested messages with various offers or with links to malware. Not only are such email messages aggravating, but they also pose a threat to your own computer, not to mention that you may be swindled. That’s why, many mail service providers resort to spam filters, which are applications that keep track of all incoming messages and filter out the unwanted ones based on their content – what words an email message consists of and how many times they’re mentioned, what site a particular hyperlink points to, what outbound email server the email message is sent from, etc. Certain hosting providers also rely on the databases of spam-detecting organizations dedicated to providing the most up-to-the-minute info about unasked-for emails, to ensure that their customers will not get any email in their inbox that’s not supposed to be there.