70db264f77
New DELIVERY FAILURE ANALYSIS section that categorizes bounces: - Recipient doesn't exist (invalid email addresses) - Mailbox full (quota exceeded) - Relay denied (not authorized to send) - Blocked/Spam filtered (IP/domain blacklisted) - DNS/Domain issues (domain not found, no MX records) - Connection failures (timeout, refused) - Other failures (uncategorized) Each category shows: - Count of failures - Clear explanation of the reason - Suggested solutions - Example email addresses affected Makes it easy to understand WHY emails are failing instead of showing cryptic log entries.