Does the job!
NeverBounce - Real-time email verification and cleaning to ensure emails never bounce.
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Email Verifier - Email verifier app lets you verify email.
Brevo - Innovative online Email Marketing solution to manage your contacts, create & send your newsletters and track your results. More than 80 000 clients. Best prices and attractive features.
Email List Verify - The Fastest Way to Improve Email List Deliverability and ROI
Campaign Monitor - Email marketing software built for designers and their clients to run successful email campaigns.