![]() ![]() ![]() Permission filters – require anyone sending a message to be pre-approved by the recipient.Rules-based filters – use user-defined criteria – such as specific senders or specific wording in the subject line or body – to block spam.General blacklist filters – stop all emails that come from a blacklisted file of known spammers.Header filters – review the email header in search of falsified information.Content filters – review the content within a message to determine if it is spam or not.There are several different types of spam filters available: But how does an email spam filter work?Ī filtering solution applied to your email system uses a set of protocols to determine which of your incoming messages are spam and which are not. However you may view it, spam is an ever-present problem for most businesses and individuals.Ĭonsidering that the volume of email worldwide is 269 billion messages per day and that 49.7% of it is spam, you can understand the need for a good email spam filter. At the very least UCE is a nuisance, and at its worst an access point for viruses and malicious code. ![]() Unsolicited commercial email (UCE) is the digital junk mail known as spam.
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