Most email messages sent around the globe nowadays are spam, i.e. undesired messages with various offers or with links to malicious software. Not only are such email messages annoying, but they also present a threat to your own personal computer, not to mention that you may be swindled. That’s why, numerous email service providers resort to email filters, which are software apps that ‘scan’ all inbound messages and filter the unwanted ones based on their content – what words or phrases an email contains and how often they’re referred to, what web site a particular link leads to, what outgoing SMTP mail server the email is sent from, and so on. Certain hosting companies also rely on the databases of spam-monitoring organizations devoted to the provision of the most up-to-date info about unwelcome messages, to ensure that their clients will not get any email message in their mailbox that is not supposed to be there.