When you attempt to enable Superfloss for GetResponse we require that you read the disclaimer that any existing callback will be overwritten and acknowledge that you understand the trade off.
If you do not know or understand what the callback does, if it exists, we recommend contacting your IT administrator before turning on Superfloss. If you don't have an IT administrator and do not know or understand what the callback does, if it exists, we recommend you do not turn on Superfloss.
You can check for if an existing callback exists by clicking here. If the URL there doesn't start with "https://webhooks.mailfloss.com" then this is an existing callback unrelated to mailfloss and will be overriden if Superfloss is turned on. Proceed with caution.