A user is asking for more detailed visibility into email bounces, specifically SMTP response codes (e.g., mailbox not found, blocked by server, spam rejection, etc.). Currently, bounce data is limited and does not include the underlying server-level response codes, which makes it difficult to diagnose deliverability issues. Request: Ability to surface more detailed bounce reporting in Engage, ideally including SMTP response codes in the recipient export or within the dashboard view. Use case: Helps troubleshoot high bounce rates, identify patterns (by domain or error type), and improve email deliverability practices.