Yes, it is perfectly normal — and useful. Delivery Status Notifications (DSN) are technical messages generated by mail servers to report a delivery failure or delay.
Pro tip: you have nothing to do. Mailpro intercepts and analyses these DSN automatically and excludes problem addresses from your next campaigns.
What are these notifications?
A DSN is issued by the recipient server (Mailer-Daemon) when:
- The email address does not exist (hard bounce)
- The mailbox is full (soft bounce)
- The recipient server is temporarily unreachable
- An antispam policy blocks the message
Why you receive them
Mailpro configures a return-path that collects every DSN. You may receive copies on your personal address for large sends.
How Mailpro processes them
| DSN type | Automatic action |
|---|---|
| Hard bounce (5xx) | Address blocked immediately |
| Soft bounce (4xx) | Retries for 24-72 hours |
| Auto-reply | Filtered, no action |
Should you worry?
Not unless the volume is abnormally high (> 5%). That may signal:
- A poorly maintained base
- Missing SPF/DKIM configuration
- A declining sender reputation
More on the bounce management page and the deliverability hub.
Let Mailpro handle the technical notifications. Start free and focus on your campaign content.