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.
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.
ZeroBounce - Removes invalid emails from your list to prevent email bounces from ruining your deliverability.