StopBouncingEmail Verification for Kit (ConvertKit)
Clean your Kit subscriber list before every major broadcast. Remove invalid, undeliverable, and disposable email addresses to protect your sending reputation and keep your account in good standing.
How to Verify Your Kit Subscriber List
Uses Kit's built-in CSV export and import. No third-party app, API key, or account access required.
Export your Kit subscribers
In Kit (formerly ConvertKit), go to Subscribers → select your segment or all subscribers → Export. Download the CSV file. Kit exports include email address, name, tags, and custom fields.
Upload to StopBouncing
Upload your Kit subscriber CSV to StopBouncing. The email column is identified automatically. All other columns from your Kit export are preserved in the results file.
Download your classified results
Each email address is classified as Valid, Invalid, Unverifiable, or Disposable. Filter the results to identify which subscribers should be removed or suppressed in Kit.
Remove invalid subscribers from Kit
In Kit, you can bulk-unsubscribe or delete contacts by importing a CSV. Invalid and disposable addresses should be unsubscribed, which adds them to Kit's suppression list and prevents accidental future import.
Why Verify Your Kit List
Protect your Kit sending reputation
Kit (ConvertKit) sends broadcasts on your behalf using your verified sending domain. Hard bounce rates above 2% on campaigns trigger reviews and can result in sending restrictions or account suspension.
Improve broadcast engagement metrics
Kit tracks open rates and click rates per broadcast. Inactive, invalid, or disposable addresses artificially suppress these metrics and can trigger spam filter adjustments by inbox providers like Gmail and Outlook.
Keep creator subscriber counts accurate
Kit billing is based on your subscriber count. Invalid subscribers that will never open or click still count toward your plan. Removing them keeps your count accurate and your plan cost appropriate.
Works with any Kit plan including Free
The CSV export and import workflow is available across all Kit plans. No API key, OAuth connection, or third-party app integration is required. Takes under 30 minutes for most lists.
Frequently Asked Questions
Does StopBouncing integrate directly with Kit (ConvertKit)?
StopBouncing uses CSV-based verification, which pairs with Kit's standard export and import functionality. Export your subscribers from Kit, verify with StopBouncing, then use the results to unsubscribe or delete invalid addresses in Kit. No direct API integration or Kit account access is required.
What happens when Kit detects a high bounce rate?
Kit monitors bounce rates per broadcast. When hard bounce rates exceed 2%, Kit may warn you and restrict future sending. Repeated high-bounce broadcasts can lead to account suspension. Kit's team reviews flagged accounts manually — recovery takes time and requires showing evidence of list cleaning.
My Kit subscribers all opted in via a landing page — do I still need verification?
Opt-in forms reduce the volume of fake or disposable addresses at the point of signup, but they do not prevent addresses that become invalid over time. Email addresses are abandoned when people change jobs, switch providers, or simply stop using an account. Lists older than 6–12 months should be re-verified even if originally opt-in.
How do I bulk-remove invalid subscribers in Kit?
In Kit, go to Subscribers → Import → and choose 'Unsubscribe contacts' rather than 'Add contacts'. Upload a CSV containing the invalid email addresses you want to remove. This adds them to Kit's suppression list, which prevents them from being re-added accidentally in future imports.
Can I verify my Kit list before migrating from another platform?
Yes — verifying a contact list before importing it into Kit is the most effective approach. Export your existing contacts from your old platform, verify with StopBouncing, and import only the valid addresses into Kit. This prevents invalid addresses from entering Kit entirely and gives your new list a clean start.
Ready to clean your Kit subscriber list?
Pay only for what you verify. No subscription. Credits never expire.
Start verifyingFrom €0.0006 per email · Results in minutes · GDPR-compliant