DNS
MX Records
Configure MX records to enable Render25 to handle bounce messages and inbound email routing for your domain.
Bounce Handling MX Record
Render25 uses a dedicated bounce subdomain to receive delivery failure notifications (NDRs). This is separate from your primary MX records and does not affect incoming email for your main domain.
| Type | Name | Value | Priority |
|---|---|---|---|
MX | bounce.yourdomain.com | feedback.render25.com | 10 |
Note
This record is only required if you want automatic bounce processing. Without it, bounces will still be detected, but processing may be delayed.
How Bounce Handling Works
When a delivery fails, the remote server sends an NDR to the return-path address (e.g., [email protected]). Render25 receives this message, parses the failure reason, and updates the email log accordingly.
Render25 classifies bounces into two categories:
| Type | Description | Action |
|---|---|---|
| Hard bounce | Permanent failure — address does not exist | Address is suppressed automatically |
| Soft bounce | Temporary failure — mailbox full, server down | Retried for up to 72 hours |
Verify
bash
dig MX bounce.yourdomain.com +short