Clyton

Clyton is an email client with advanced security and spam filtering features.

Foxmail

Foxmail is a free POP3 and IMAP4 e-mail client in English and Chinese for Windows systems.

Microsoft Exchange Server is a messaging and collaborative software product developed by Microsoft.

Mail and Calendar apps already built in Windows 10.

Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.

The Bat! is a secure desktop email client for Windows, designed to protect your correspondence against third-parties and to save your time.

TrulyMail is a multiple email management program for those users who have to frequently sign in to multiple email accounts.

Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more.

eM Client is a Windows-based email client for sending and receiving emails, and managing calendars, contacts and tasks.