Every message your MTA touches, measured to the DSN.

Your MTA tells you it sent. It can't tell you it landed.

Queue dashboards stop at the handoff. BigStats reads the DSN, the SMTP reply and the enhanced status code behind every failure, so a Gmail block or a throttling pattern is a named, quantified problem instead of a vague dip in results.

Reputation damage compounds while you're not looking.

A bounce spike on one IP or one sending domain quietly trains filters against you for weeks. Anomaly detection against a rolling 7-day baseline, a silent-feed watchdog and escalating reminders push it to email, Slack or your own webhook the same hour it starts — and stop the moment someone acknowledges or the metric recovers.

One bad mailbox provider hides inside an average.

A healthy 98% overall can conceal Microsoft rejecting a third of your mail. Per-domain and per-ISP breakdowns, plus shared-pool and cluster views, isolate exactly which IP, sender or receiver is dragging placement down.

Answers in minutes, not a spreadsheet afternoon.

Ask the built-in analyst in plain English, or hit "ask about this" on any chart to get the number explained in context. Save the report as a named view and it's one click for the whole team next week.

Full Event Notification System coverage — injections, deliveries, deferrals, bounces, opens, clicks, unsubscribes and complaints, with DSN and SMTP response parsing.

Log-hook ingestion of Reception, Delivery, Bounce, TransientFailure, Expiration, AdminBounce, OOB, Feedback and Rejection records, with enhanced status codes, egress pool and source IP mapped into the same reports.

Signed webhook envelopes for delivered, deferred, bounced, complaint, suppressed, rejected, unsubscribed and injected events — one event per recipient, replay-safe.

Configuration-set events delivered over Amazon SNS — Send, Delivery, DeliveryDelay, Bounce, Complaint and Reject — with verified SNS signatures, automatic subscription confirmation and tenant tags for per-client reporting.