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          How Do Spam Filters Work?

          How Do Spam Filters Work?

          Although spam filters can work in different ways, they typically examine sending reputation, email content, and recipient engagement when determining if a message is spam.

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          • Email Authentication and Sending IP Reputation
            To determine if a message is spam, most spam filters check for appropriate email authentication and look at your sending IP reputation. To avoid having your emails considered spam, use email authentication and protect your sending reputation.
          • Best Practices To Avoid Spam Filters
            Some spam filters evaluate your email’s subject and body text when determining whether a message is spam. To keep your emails from triggering spam filters, here are some best practices.
          • List Hygiene and Spam Filters
            List hygiene is key to getting past spam filters. If you send emails to unengaged or invalid prospects who ignore your emails, filters assume you're sending spam.
           
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