@mpalmer Thanks for the suggestion but I’m not a developer unfortunately, I was just asking if they were handled or not. I assumed it was a given seeing the complaints appear to be sent via the same method as bounces. All legit SMTP services will have some method to access your spam complaints.
Here is an excerpt from Amazon SES:
Most email client programs provide a button labeled “Mark as Spam,” or similar, which moves the message to a spam folder, and forwards it to the ISP. Additionally, most ISPs maintain an abuse address (e.g., firstname.lastname@example.org), where users can forward unwanted email messages and request that the ISP take action to prevent them. In both of these cases, the recipient is making a complaint. If the ISP concludes that you are a spammer, and Amazon SES has a feedback loop set up with the ISP, then the ISP will send the complaint back to Amazon SES. When Amazon SES receives such a complaint, it forwards the complaint to you either by email or by using an Amazon SNS notification, depending on how you have your system set up. For more information, see Monitoring Using Amazon SES Notifications. We recommend that you do not make repeated delivery attempts to email addresses that generate complaints.