MailChimp - MailChimp is the best way to design, send, and share email newsletters.
NeverBounce - Real-time email verification and cleaning to ensure emails never bounce.
Constant Contact - Constant Contact offers email marketing, social media marketing, online survey, event marketing, digital storefronts, and local deals tools.
Verimail - Clean up email-address lists of any size or use our powerful API for real-time verification.
Campaign Monitor - Email marketing software built for designers and their clients to run successful email campaigns.
Email Verifier - Email verifier app lets you verify email.