How to set up ZeroBounce
Authentication
ZeroBounce uses API key authentication:- Sign up at zerobounce.com
- Navigate to your API settings
- Copy your API key
- Paste the API key in Cargo when connecting
ZeroBounce actions
Verify email
Check if an email address is valid and deliverable. Required fields:- Email: The email address to verify
Verification statuses
ZeroBounce returns detailed verification results:| Status | Description |
|---|---|
| valid | Email exists and is deliverable |
| invalid | Email does not exist or will bounce |
| catch-all | Domain accepts all emails (unverifiable) |
| spamtrap | Known spam trap - do not email |
| abuse | Known complainer address |
| do_not_mail | Should not be emailed (role-based, etc.) |
| unknown | Unable to determine status |
Response data
| Field | Description |
|---|---|
| status | Verification status |
| sub_status | Detailed status reason |
| account | Email account name |
| domain | Email domain |
| did_you_mean | Suggested correction for typos |
| domain_age | Age of the domain |
| free_email | Is it a free email provider? |
| mx_found | Does domain have MX records? |
| mx_record | Primary MX record |
| smtp_provider | Email service provider |
Best practices
- Verify emails before importing to your email platform
- Re-verify old contacts periodically (emails decay)
- Treat “catch-all” as valid but monitor bounces
- Never email “spamtrap” or “abuse” addresses
- Use “did_you_mean” to suggest corrections
- Cache verification results to save credits
Integration with other tools
ZeroBounce works well in combination with:- Email finders: Verify found emails before outreach
- CRM sync: Keep verification status updated
- Campaign tools: Ensure list hygiene before sends