There are many alternatives to Opera Mail for Windows and since it's discontinued a lot of people are looking for a replacement. The best Windows alternative is Thunderbird, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to Opera Mail and 17 are available for Windows so hopefully you can find a suitable replacement. Other interesting Windows alternatives to Opera Mail are Microsoft Outlook, Spark Mail, eM Client and Mailspring.
Cross-platform email client supporting multiple identities, chat, and strong filtering. Extend functionality with add-ons like RSS/Atom feed readers and PGP support.
Streamline emails, calendars, contacts, and task management with a smart inbox prioritizing critical messages. Includes calendar scheduling, third-party app integration like Facebook, Dropbox, and Trello, and support for Microsoft Exchange, Outlook.com, and Gmail, ensuring efficient task and email handling.
E-mail app with all the great features: swipes (long/short), snooze, add (multiple) attachments from the cloud, support for various e-mail services and more.
eM Client is a full featured e-mail client with a modern and easy to use interface. eM Client also offers calendar, tasks, contacts, notes and chat.
Boost your productivity and send better email with Mailspring, a beautiful, fast email client for Mac, Windows, and Linux. Mailspring is free to use and an optional pro version adds read receipts, send later, reminders and more.
Email and news client on GTK+ foundation featuring quick performance, extensible plugins, secure protocols, advanced filtering, strong folder and contact management, lightweight design, powerful search, customizable interface, multi-language support, and encryption.
Sylpheed is a simple, lightweight but featureful, and easy-to-use e-mail client (mailer, MUA).
The Bat! is a secure email client software, built to protect your correspondence against third-parties.
Productivity-centered email application streamlines inbox management, uses AI for drafting responses, automates snippets, summarizes conversations, enables timely sends, integrates calendar and CRM, and includes collaborative features like live views and comments.
Foxmail is a free POP3 and IMAP4 e-mail client in English and Chinese for Windows systems.
Trojitá, is a fast Qt IMAP e-mail client that respects open standards and facilitates modern technologies. Trojitá values vendor-neutrality that IMAP provides and is committed to be as interoperable as possible.
The most powerful platform for email productivity in a beautiful native app — on desktop and mobile.
United States
Ukraine
Czechia
EU
Japan
Moldova
China
The addons extend Thunderbird's functionality making it by far the best email client ever made.