Thank you for coming to the Community. I can appreciate why knowing who has marked you as spam can be helpful to possibly addressing the reason why they marked you as such. However, we do not share that information because it infringes on the privacy of the individual making that decision. This article is helpful in understanding how spam is reporting and gives a few different options for how to reduce spam in the future.
Same thing just happened to me! Everyone on my list got there because they opted in. It's frustrating that someone can just flippantly report things as spam and we can't even respond. Especially when they can simply unsubscribe.
Thank you for sharing your experience with the community!
We understand that this can be quite frustrating when a recipient clicks the spam button on an email without knowing the effect of this action other than not receiving emails anymore. It's far more common than most people would think.