@brewcrew I've seen this happening before as well and could be based on how your email systems have been setup. Is the from address in Klaviyo the same as the domain your sending to?
So is the from address @yourdomain.com and where you're sending it to also @yourdomain.com?
If so I suggest to try test sending it to a @gmail or @outlook or other domain to check if you receive it.
If you do get it this can mean that the configuration of your email systems is potentially blocking emails. They're probably seeing emails from Klaviyo as an “unknown” server and marking them as potential spoofing and blocking them. In such a case please check with your sys admin to allow and trust emails from Klaviyo.
Hope this helps
Omar Lovert // Polaris Growth // Klaviyo Master Platinum Partner
We help with e-commerce growth through CRO, Klaviyo and CVO