Runs in your browser
Keep First Duplicate
Keep the earliest row when an address repeats.
How it works
Keep First Duplicate
Keep the earliest row when an address repeats. The check runs in your browser. MailShrine Email Sanitization flags invalid syntax, disposable and role-based addresses, and duplicates. It does not probe mailboxes, and it does not send the campaign.
Results appear here after you click Run check.
The full pass — syntax, disposable and role flags, duplicates — is Email Sanitization. You start with 200 credits per month. The send, later, is Email Marketing.