Top 10: Email Servers for Eastern Europe

Microsoft 365 (formerly Microsoft Office 365) is commercial software plus services offering a set of products from Microsoft. Designed to help you achieve more with innovative Office apps, intelligent cloud services, and world-class security. The free online MS Office document editors (Word, Excel, PowerPoint) are available in OneDrive.

Get business email, video conferencing, and cloud storage from Google. All you need to do your best work, together in one package that works seamlessly from your computer, phone or tablet. The free G Suite version, including online document editors (Google Docs, Google Spreadsheets) is available in Google Drive.

Microsoft Exchange Server is the server side of a client–server, collaborative application product developed by Microsoft. Exchange's major features consist of electronic mail, calendaring, contacts and tasks; support for mobile and web-based access to information; and support for data storage.

Secure hosted email server with custom domain. Shared calendars, chat, storage, documents & apps. The only solution integrated and working together in one screen.

MDaemon is a private secure Email Server software for the SMB market. lexible email management, security and collaboration features for on-premises, virtual, or hosted server deployments.

Kerio Connect is a commercial mail and groupware server that runs on Windows, Linux, and Mac OS X. Its features include encrypted access using SSL, anti-virus and anti-spam protection, native over-the-air handheld synchronization, webmail interface, connector for Microsoft Outlook and groupware features.

Open-Xchange is an open-source corporate email server with collaboration tools - calendar, tasks, contacts, and shared folders for version-controlled files. Accessible via web and mobile clients. Compatible with Outlook and other email clients. Available as an installable solution or SaaS service. A free community version is also available.

Amazon WorkMail is a secure, managed business email and calendaring service with support for existing desktop and mobile email clients. Amazon WorkMail gives users the ability to seamlessly access their email, contacts, and calendars using Microsoft Outlook, their web browser, or their native iOS and Android email applications. You can integrate Amazon WorkMail with your existing corporate directory and control both the keys that encrypt your data and the location in which your data is stored.

Easily configurable mail server for small business from the creators of TheBat! Suitable for providing employees with corporate email addresses and for setting up an internal messaging network.

Zimbra Collaboration Server is an email and calendar server plus much more; think about it like a next-generation Microsoft Exchange server. In addition to email and calendar, it provides file sharing, tasks, contacts, social media, document management and simplified administrative controls all in an award winning webmail user interface built with the latest AJAX web technology. ZCS also provides mobility and syncs to desktop client applications; the server is deployed on commodity Linux and Mac server hardware.

HCL Notes (formerly IBM Lotus Domino and Lotus Notes) is an installable enterprise-class system for email, messaging, task collaboration, and time management. It offers web, mobile, and desktop clients. HCL is an Indian company.