Bounces are emails that could not be delivered to the recipient. Mailpro handles them automatically and protects your deliverability.
Pro tip: a bounce rate below 2% signals a healthy list. Above 5%, your deliverability is at risk.
Hard bounce vs soft bounce
| Type | Cause | Mailpro action |
|---|---|---|
| Hard bounce | Non-existent address, invalid domain | Permanent block |
| Soft bounce | Mailbox full, server down | Automatic retries |
How Mailpro handles them
- Auto-detection on every send
- Classification by SMTP return code
- Hard bounces: excluded permanently from future campaigns
- Soft bounces: retried for 24-72h, then blocked if persistent
- Detailed report in your account
Why it matters
Managing bounces protects your sender reputation, keeps you out of spam folders and saves credits — see why manage bounces.
How to reduce bounces
- Use double opt-in on your forms
- Validate emails at signup (regex + DNS)
- Clean inactives older than 6 months
- Avoid importing old or stale lists
More on the bounce management page and the deliverability hub.
Mailpro keeps your lists clean. Start free and benefit from automatic bounce handling.