A spam filter testing tool cannot view email bounce rates, so this process must be performed in addition to the recommendations from checking your email spam score using the form above. The best way to ensure low bounce rates is an industry best practice of validating email addresses as soon as they subscribe to your newsletter or contact list. Even legitimate users can make typos which would provide an invalid email address that increases your bounce rate. It's important to repeat validation every 3-6 months to identify deactivated accounts, complainers, and those that have been converted into spam traps. IPQS can detect emails with poor reputation that should be scrubbed from your email marketing lists.