Hi @jdannydavis,
Welcome to the Community! Sorry you’re experiencing these bounce issues, would love to help clarify what might be going on here!
A soft bounce is always caused by a temporary reason, such as when a recipient's inbox is full or when their email server is momentarily down. In most cases of soft bounces, the issue pertains to the client's inbox and their setup rather than your brand.
Can you confirm that the soft bounces are only coming only mac.com addresses and for all your mac.com subscribers or just some of them? Additionally, no worries about being a beginner at Klaviyo, we all were at one point! However, if you’re new to Klaviyo, is it also possible that your account is new and just started sending messages from your brand to inboxes? This could definitely have an impact on how inboxes see you at this point, i.e. inboxes are a little more trepidatious of new senders and want to protect their customers from possible spam.
Finally, you said you’ve checked out most resources in our Community on this topic, however, if you haven’t found this one yet, I’d recommend checking it out as it also links to various other helpful threads!
Thanks for participating in our Community!
-Taylor