6 Types Of Spam Filters; Because Even Mild Spam Can Lead To Infections And Downtime
Everyone knows a spam filter keeps the undesirable messages out. But how exactly do they work? And how can you ensure yours is the right one for your business?
What is a spam filter? A spam filter is a sorting solution that helps you weed out the infectious or bad messages in your e-mail. There are three basic ways these filters are implemented; a hosted solution on a cloud service, a device in your office or an on premise appliance, and a local copy installed directly on your computer. While no spam filter is a 100% effective, a business operating without a filter is generally bombarded with so many messages that e-mail is almost rendered useless and unmanageable.
What are the different types of spam filters? Spam filters come in a variety of types. Here is a quick list of six filters that help block out risky e-mail messages:
- Content filters: These filters review the words and content inside of your e-mail messages to decide if they are spam or safe.
- Header filters: This filter simply looks at the e-mail header to identify falsified or known infectious information.
- Permission filters: These filters force the sender to be approved by the recipient before accepting any correspondence.
- General blacklist filters: This type of filter stops all e-mails that come from known spammers that are kept on a list of offenders known as a blacklist.
- Challenge-response filters: These filters are on the inside of your company to restrict outgoing messages. They require anyone sending a message to enter a code gaining permission to send an e-mail.
- Rule-based filters: This type of filter references a defined set of criteria and filters the content of your messages based on specific wording in the body or header.
Spam filter basics for business. The spam filter you use will largely depend on the volume of messages you and your staff manage daily. It is also good to consider the types of messages you send and receive. Do you often exchange sensitive personal or business information? A company that is regulated by industry standards may require tighter security.
Test and monitor your filter. Even when you select a filter, test and monitor its effectiveness. New threats arise at an alarming rate and these filtering solutions can be modified to block the specific types of messages your company is receiving. Ask these critical questions; Do the good messages come through? Do spam or virus messages still land in your inbox? How quickly are patches and updates being pushed to your machines?
Questions? Having issues with infections, spam in your inbox, or are you concerned about updates and patches? Give us a call. We can help put the right tools in place to improve your e-mail security solution. Your business relies on e-mail communications so make sure it is secure and reliable.
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