Preview Emails Going to Spam

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There are several reasons why you may see Klaviyo preview emails land in your spam folder. Please review the possibilities below, and reach out to our Customer Success Team if you need any additional support.

Preview Email Limits

When you are sending preview emails, you can directly send to email addresses without having to add these emails to a particular list. This makes it easier for spammers to abuse this feature. In order to protect all of our customers, we impose sending limits on preview emails. If you have reached your limit, you will need to wait 24 hours after your limit is reached for it to reset.

If you have reached your email sending limit, you can also preview/test your emails directly within the template. To do this, select the Show directly in Klaviyo option.


Alternatively, you can create a preview list and send a live campaign to this list of people. Learn more about previewing emails in Klaviyo.

Preview Emails and Gmail Spam Filters

Gmail adjusts which emails get caught by its spam filters on a user-by-user basis. This means that Gmail is always learning based on your specific email address and how you interact with email.

If you send frequent preview emails to yourself, but don't necessarily open or click these emails, it's possible that your previews will start to go to your spam folder. If you engage with these preview emails by opening and clicking them and manually prompt Gmail to place them back in your primary inbox, you should see this trend shift. You can do this by dragging the email out of your inbox and into your Primary tab.

To check to ensure that the content of your email doesn't trigger spam filters more generally, you can use a service like Litmus to confirm your emails are passing basic spam filter tests.

Corporate Spam Filters and Firewalls

Corporate spam filters and firewalls can be strict if you are sending multiple test emails (or many emails in general) to multiple people at your company. If you are seeing this issue and think it might be a firewall issue, check your firewall settings to ensure you're not doing anything to block Klaviyo emails.

Preview Email Content

Make sure that your test content looks as much like your real campaign as possible. If you are using filler words or filler content than sometimes this will trigger the email client’s spam filter.

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