StopBouncingClean your Mailchimp audience.
Send with confidence, not risk.
Invalid addresses in your Mailchimp audience trigger hard bounces, damage your sender reputation, and risk getting your account suspended. Verify before you send — from €0.0006 per address.
No monthly fee · Credits never expire · Data deleted in 48 h
How to verify your Mailchimp audience
Four steps. No Mailchimp API key required.
Export your Mailchimp audience
In Mailchimp, go to Audience → All contacts → Export audience. Select CSV and download the file containing your subscribers.
Upload to StopBouncing
Upload your exported Mailchimp CSV to StopBouncing. The email column is identified automatically and verification starts immediately.
Download the classified results
Each address is classified as Valid, Invalid, Unknown, or Disposable. Download your results to see which addresses should be removed.
Clean your Mailchimp audience
Archive or unsubscribe Invalid addresses in Mailchimp before your next send. This keeps your bounce rate within Mailchimp's acceptable limits.
Why Mailchimp users verify with StopBouncing
Avoid Mailchimp account suspension
Mailchimp enforces strict bounce rate limits. Accounts that repeatedly exceed the 2% hard bounce threshold can be suspended. Verify your audience before large sends to stay within limits.
Reduce the cost of unengageable contacts
Mailchimp pricing is based on your total audience size. Invalid addresses that will never open or click still count against your plan. Removing them reduces your billable contact count.
Protect your sender domain reputation
Mailchimp sends on your behalf from your verified domain. High bounce rates damage the reputation of your sending domain — affecting deliverability even outside Mailchimp.
GDPR-compliant verification
Uploaded data is automatically deleted within 48 hours. No third-party sharing, no ad-platform integration. Suitable for audiences subject to EU data protection requirements.
Pay per verification, no subscription
Clean your Mailchimp audience before a big send — without a monthly fee.
- 10,000 Mailchimp subscribers → €6
- 50,000 subscribers → €30
- 200,000 subscribers → €120
- Credits never expire
Frequently asked questions
Does StopBouncing integrate directly with Mailchimp?
StopBouncing is CSV-based, which is how Mailchimp handles bulk contact import and export. Export your audience from Mailchimp, upload to StopBouncing, then use the results to archive or unsubscribe invalid contacts in Mailchimp. No OAuth or API access is required.
What's Mailchimp's bounce rate threshold before suspension?
Mailchimp flags accounts when hard bounce rates exceed 2% on a given campaign. Sustained high bounce rates across multiple campaigns can lead to account holds or suspension. Verifying your audience before sends keeps your rate well below this threshold.
Should I archive or unsubscribe invalid contacts in Mailchimp?
Archive is the better choice for most use cases. Archiving removes contacts from your active audience (and your billable count) without permanently deleting them. If you later discover an archived contact is valid, you can unarchive them. Unsubscribing prevents resubscription, which may not be what you want for contacts you're unsure about.
How much does it cost to verify a Mailchimp audience?
€0.0006 per address with no monthly fee or minimum purchase. A 10,000-contact Mailchimp audience costs €6. A 50,000-contact audience costs €30. Credits never expire, so there's no pressure to use them all at once.
Can I verify new subscribers before they enter Mailchimp?
Yes — through the StopBouncing API. If you're collecting email sign-ups via a custom form, your own website, or a third-party tool before syncing to Mailchimp, you can call the StopBouncing API at the moment of signup to check validity. This prevents invalid addresses from ever reaching your Mailchimp audience.
Does verification affect Mailchimp's own bounce handling?
Mailchimp handles bounces from actual sends and automatically unsubscribes hard bounces after one occurrence. StopBouncing's verification is proactive — it runs before you send, using SMTP checks to identify invalid addresses before they become Mailchimp bounce events. The two work together: verify first, then let Mailchimp's post-send bounce handling clean up anything that slips through.