Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
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.
eM Client - eM Client is a fully-featured email client for Windows and macOS with a clean and easy-to-use interface. eM Client also offers features for calendars, tasks, contacts, notes, and chat.
Campaign Monitor - Email marketing software built for designers and their clients to run successful email campaigns.