Laravel debug mode can be a valuable tool for developers, but it also poses a risk to sensitive information such as API keys and passwords. When in debug mode, this information is exposed in plain text, making it vulnerable to exploitation by bad actors using automated tools. If an attacker gains access to these credentials, they can use them to send phishing emails through the Postmark account, potentially compromising the site's reputation and sending reputation. To mitigate this risk, developers are advised to turn off debug mode for live sites and rotate their API tokens to ensure an extra layer of security.