What is an Email SPAM filter
Email services use inbound and outbound email filters to prevent spam. These spam filters have some metrics and algorithms that assign a numerical score after the filtering process that reflects the probability of the email being spam.
Type of email filters
There are three types of email filters:
- Gateway – typically used by large business and includes Barracuda and Mimecast as examples
- Hosted – typically used in businesses that have developed their own method to detect spam based on sender reputation and content and includes Cloudmark as an example
- Desktop – configured by the user and includes Outlook with SmartScreen as an example