Most of the email messages sent around the globe these days are spam, i.e. unsolicited messages with different offers or with links to malware. Not only are such emails irritating, but they also pose a risk to your own PC, not to mention that you may get duped. For this reason, lots of mail service providers make use of email filters, which are software apps that ‘scan’ all inbound messages and filter out the undesirable ones based on their content – what words or phrases an email message includes and how many times they are referred to, what site a certain link points to, what outgoing server the message is sent from, etc. Certain hosting providers also use the databases of spam-detecting organizations dedicated to providing the most up-to-the-minute information about unwanted emails, to ensure that their customers won’t receive any email message in their inbox that’s not supposed to be there.