How to Remove Invalid Emails From Your Mailchimp List Before Your Next Campaign

Mailchimp is one of the most popular tools for email marketing, but it can only tell you about a dead address after you've already sent to it. If you'd rather catch problems first, you can check your audience before your next campaign.

Here's how to remove invalid emails from your Mailchimp list using VerifyFlow.

Why clean your Mailchimp audience first?

Every campaign sent to an address that doesn't exist is wasted effort. Over time, a mailing list full of dead ends makes your reports less accurate and can make inbox providers less keen to deliver your email. Cleaning before you send is far easier than repairing the damage afterwards.

Step 1: Export your audience from Mailchimp

In Mailchimp, go to your Audience, open the export option and download your contacts as a CSV file. Keep the file somewhere safe. It's your backup.

Step 2: Upload the file to VerifyFlow

Pay for VerifyFlow, and you'll get an access code straight away. Then upload the CSV. VerifyFlow charges a flat £20 per list, up to 1,000,000 rows, with no subscription.

Step 3: Review your results

You'll see your addresses sorted into valid, invalid and catch-all. Invalid addresses are dead ends. Catch-all addresses belong to domains that accept mail for anything, so they can't be confirmed either way.

Step 4: Remove the invalid addresses from Mailchimp

Take the invalid addresses from your results and remove them from your Mailchimp audience. You can archive them or delete them, whichever suits how you manage your contacts. Archiving keeps a record, while deleting clears them out completely.

Step 5: Decide what to do with catch-all addresses

Don't delete these automatically. Many belong to real people at real companies. A sensible approach is to send them a small test campaign first. If they engage, keep them. If they don't, retire them.

Step 6: Send your campaign

Your next send now goes to a cleaner mailing list. You should see fewer dead ends in your report, and your open and click rates will reflect real people instead of ghosts.

How often should you do this?

• Before any large campaign.
• Before a big sale or seasonal push for online shops.
• At least twice a year for newsletters and charity supporter lists.
• Any time you import a new batch of contacts from an event, a form or another tool.

Final thoughts

You don't need to wait for a problem to show up in Mailchimp. Export, verify with VerifyFlow, remove the invalid addresses and send with confidence. A clean mailing list makes every piece of email marketing work harder.