mailtesterninja

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verifymailjs

A robust and modern JavaScript library for validating and categorizing email addresses. You can check if an email address is valid, disposable, role-based, free, or from a temporary email provider.

advanced-email-existence

A Node.js library to check the existence of an email address by verifying with the domain's mail exchange (MX) servers and using SMTP commands.

email-butler

Verify emails and suggest correct spelling for the email domain.