MailChimp - MailChimp is the best way to design, send, and share email newsletters.
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Kingmailer - Kingmailer helps you send, receive and route/forward emails.
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Awesome Mails - Awesome Mails creates beautiful image map emails, featuring an easy to use drag-and-drop editor...
Marble Responsive Email Designer - Marble helps you design beautiful and mobile-friendly emails and newsletters.