Top Alternatives to Polymail

Thunderbird is a open source mail client developed and maintained by Mozilla foundation.

Microsoft Outlook is a personal information manager from Microsoft.

Mailbird is a desktop email client for Windows 7, 8 and 10.

Apple Mail is an email client included with the operating systems macOS, iOS and watchOS by Apple Inc.

eM Client is a Windows based e-mail client for sending and receiving e-mails, managing calendars, contacts, and tasks.

Evolution is the official personal information manager for GNOME.

Postbox is powerful, intuitive, ultra-customizable, speedy task manager.

Geary is an email application built around conversations, for the GNOME 3 desktop. It allows you to read, find and send email.

Zoho Mail is a email service with ample storage, POP and IMAP access, some integration with instant messaging and online office suites.

EssentialPIM is a free Personal Information Manager that keeps up with the times and lets you manage appointments, tasks, notes, contacts, password entries, etc.

The Bat! is an email program for Windows that protects the correspondence and empowers the users to handle large amounts of emails quickly and efficiently.

Airmail is a fast mail client for Mac and iPhone.

Mutt is a text-based email client for Unix-like systems.

Zimbra Desktop is an offline client that lets you manage various email accounts in one desktop tool.

OpenProject is a web-based project management system for location-independent team collaboration.

KMail is the email component of Kontact, the integrated personal information manager from KDE.

Kontact is a personal information manager and groupware software suite developed by KDE. It supports calendars, contacts, notes, to-do lists, news, and email.

Spark is a fast, smart mail manager app.

Microsoft Mail and Calendar apps help you stay up to date on your email, manage your schedule and stay in touch with people you care about the most.

MailMate is an IMAP email client for macOS featuring extensive keyboard control, Markdown integrated email composition, advanced search conditions.

TypeApp is a mobile email client app.

Soverin is a secure mail hosting platform.