An email deliverability verifier is a tool that helps you avoid having your emails sent to spam folders. It does this by analyzing a number of factors that influence the email delivery process. Some of these include the reputation of your email domain, authentication methods used in a given message, and more.

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It’s important to take a close look at your email metrics and identify spikes in unsubscribes, bounces, and spam reports to determine what may be contributing to poor deliverability rates. Often, these issues are caused by invalid or non-existent email addresses. Using an email verification tool like Cognism can help you clean up your list, reducing these issues and ensuring that more of your messages reach the inbox.

ISPs work hard to protect their users from spam, so it’s no surprise that they will aggressively filter messages and place them in different folders based on a number of factors. One of the main ways they do this is by maintaining highly-effective spam filters that combine hard rules with probabilistic methods. These are then used to evaluate each message before it’s allowed into the inbox.

A number of factors can cause an email to be placed in the spam folder, including a high unsubscribe rate, a high bounce rate, and poor quality content. It’s also important to consider that some ISP providers do not accept any emails from a specific domain if the provider receives too many complaints or a large number of messages marked as spam. To avoid this, it’s recommended that you implement a double opt-in process for all signups and to only send messages to recipients who have opted in to your communications.