SmarterMail is a Microsoft Exchange alternative that natively supports MAPI.

Mozilla Thunderbird Eclipse is an email client prioritizing safety, speed, and user-friendliness. It has numerous built-in features, such as easy message search, customizable views, and IMAP/POP and RSS support. A Portable version is also available.

Mozilla Thunderbird Eclipse is an email client prioritizing safety, speed, and user-friendliness. It offers a wide range of built-in features, including a user-friendly message search, customizable views, and support for IMAP/POP and RSS. The latest beta and a portable version are also available.

Mailbird connects all your preferred email, calendar, task, and messaging apps into one versatile utility.

Betterbird is an enhanced version of Thunderbird with new features and bug fixes not available in Mozilla Thunderbird.

Kiwi for Gmail is an excellent app that brings Gmail and Google apps directly to your desktop.

POP Peeper is an email notifier that runs in your Windows taskbar and alerts you when you have new email messages.

The Bat! Home Edition was created for dealing with the ever-growing volume of emails as quickly as possible, saving you valuable time.

MailWasher allows you to preview multiple accounts and all aspects of your email before you download them.

Mozilla Thunderbird Eclipse ESR is a versatile and free email application that stands out due to its ease of customization and a rich set of features that enhance user experience.
Portable version also available.

hMailServer is an Open Source e-mail server that can be used by any user type, from internet service providers, and governments, all the way to regular users.

SpamAssassin for Windows is an effective anti-spam solution utilizing text analysis, Bayesian filtering, and DNS requests to block known spam senders.

Mailtrack is a Chrome extension that seamlessly tracks your Gmail, keeping you informed of the status of your message.

eM Client is a feature-rich email client that includes a modern, easy-to-use interface and offers a calendar, tasks, chat, contacts, and more.

Inbox Notifier allows you to receive Gmail notifications instantly right from the Windows taskbar.

OE Classic is an email and Usenet reader designed to look and feel like the classic Outlook Express.

Mozilla Thunderbird Eclipse Portable is an email client designed with a focus on safety, speed, and ease of use. It comes equipped with a variety of built-in features that enhance the user experience. The latest beta and installer/Linux/Mac versions are also available.

Proton Mail offers a refreshing change if you're tired of your inbox being a data mine for advertisers.

Howard Email Notifier will keep you notified about new emails in your outlook.com, live.com, hotmail.com, mail.google.com, mail.yahoo.com, facebook.com, LinkedIn, twitter.com, e.mail.ru, orange.fr, IBM / Lotus Notes, mail.virgilio.it, O2.pl, Yandex, Laposte.net and www.zoho.com inbox.

Gpg4win (GNU Privacy Guard for Windows) is encryption software for files and emails.

Mozilla Thunderbird Eclipse ESR Portable is a highly customizable email application that offers a wide range of features to improve the user experience. Its versatility allows users to tailor the application to their specific needs, making it an excellent choice for managing email effectively. Available as an installer as well as for Linux and Mac.

Mailspring is an easy-to-use cross-platform IMAP email client.

Email Director .NET is a free Windows-based email, SMS, and fax marketing tool.

Email Studio .NET is a focused, desktop-based tool built for anyone who needs to design, manage, and send personalized emails, without relying on bloated web apps or overkill marketing suites.

MailStore Home lets you archive your private emails from almost any email source and search through them efficiently.