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Top 10 Email Servers for business
August 04, 2025 | Editor: Adam Levine
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Enterprise mail servers that ensure reliable email and calendar communication, data security, and advanced features such as spam filtering, encryption, and integration with other business tools.
1
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.
2
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.
3
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.
4
Open Source Mail Server Solution. The right way to build your mail server with open source softwares. Works on Red Hat, CentOS, Debian, Ubuntu, FreeBSD, OpenBSD.
5
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.
6
Mailcow is a Docker based email server which provides an elegant web interface for managing domains, mailboxes and more. Mailcow makes the provisioning and managing of complex email applications easy.
7
hMailServer is a free, open source, e-mail server for Microsoft Windows. It's used by Internet service providers, companies, governments, schools and enthusiasts in all parts of the world.
8
MailEnable is an Email Server software that companies and Internet Service Providers use to provide messaging and collaboration
9
Postfix attempts to be fast, easy to administer, and secure mail server. The outside has a definite Sendmail-ish flavor, but the inside is completely different.
10
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.
11
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.
12
Secure hosted email with custom domain. Shared calendars, chat, storage, documents & apps. The only solution integrated and working together in one screen.
13
SmarterMail offers all of the same features as Microsoft Exchange, but at a FRACTION of the cost. Unlike Exchange, features like audio and video group chat, and Team Workspaces for team meetings and group collaboration are included at no extra charge.
14
HLC Notes (formerly IBM Lotus Notes) is email software that gives teams access to email, calendar and contact management capabilities, and seamlessly integrates other collaboration tools and Domino business applications.
15
OpenText GroupWise gives you modern email, messaging, calendaring, contact management and scheduling for today’s mobile world. With a dynamic, flexible interface, you can easily meet your organization’s requirements.
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Mail server software, calendaring & collaboration. Self hosted, all-in-one email server built for speed & security. Runs on Linux, Windows & Docker.
17
Oracle Beehive provides an integrated set of communication and collaboration services built on a single scalable, secure, enterprise-class platform. Beehive allows users to access their collaborative information through familiar tools while enabling IT to consolidate infrastructure and implement a centrally managed, secure, and compliant collaboration environment built on Oracle technology.
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Rackspace Email hosting gives you the power to securely manage email from any web browser on the device of your choice - no licenses to keep track of or software to download. Microsoft Outlook compatible
19
Russian client-server platform for unified communications. The CommuniGate Pro Server application processes requests sent over the network by a variety of clients - communication applications installed on desktops, laptops, mobile devices and other end-user systems. These client applications provide users with E-mail, groupware, IM/Presence, telephony, and other services by connecting to the CommuniGate Pro Server via its extensive set of supported standard protocols
