Hi @SeanMcC,

Thanks for sharing your question with us! 

Unfortunately, we don’t have a feature within Klaviyo to filter spam percentages by inbox provider.

However, the spam complaints in a performance report are reporting on users who actively mark your messages as spam and not that are caught by the spam filter. Users could be doing this because your sending to users who didn’t subscribe or you’re sending unwanted content to these users. 

I would suggest implementing these practices to reduce spam complaints to improve your deliverability and decrease those spam complaints in your reports.

• Send to subscribed recipients. If you're not, build an engaged segment to ensure that you're sending mail to people who want it.
• Include at least one unsubscribe link in your email and make them easy to find. Add an unsubscribe tag into the header and footer of each email.
• Turn on double opt-in.
• Make sure your email doesn't contain graphic or explicit content.
• Make sure your subject line aligns with the email content. When people feel deceived, they are more likely to mark as spam.

Finally, I’d recommend checking out these additional resources to fix the problem! 

• How to reduce spam complaints

Thanks for participating in the Community!

-Taylor