Zimbra
Zimbra is trusted by over 500 million users to increase productivity with a complete set of collaboration tools while maintaining total control over security and privacy.
Zimbra Alternatives
The best Zimbra alternatives based on verified products, community votes, reviews and other factors.
Latest update:
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Web-based IMAP email client
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A fully fledged, free email server solution, an open source project (GPL v2).
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Featured
The #1 email warming service to improve your deliverability by generating realistic and meaningful engagement to your emails. Easy-to-use solution to help you land in the main inbox instead of the spam folder.
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Microsoft Exchange Server is a messaging and collaborative software product developed by Microsoft.
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An open source mailserver suite.
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Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
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Postfix is a mail transfer agent (MTA) that routes and delivers electronic mail.
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Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
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Google's encompassing suite of cloud-based business apps.
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Horde Groupware is a free, enterprise ready, browser based collaboration suite.
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Mail-in-a-Box provides webmail and an IMAP/SMTP server for use with mobile devices and desktop mail software and also includes contacts and calendar synchronization.
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hMailServer is a free e-mail server for Microsoft Windows.
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Mailbird is the best email client for Windows 7, 8 and 10
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RainLoop is a web based email client.
Generic Zimbra discussion
Zimbra Reviews
External sources with reviews and comparisons of Zimbra
Categories: Email, SMTP Server, Calendar

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NEW Zimbra Patches: 9.0.0 Patch 22 + 8.8.15 Patch 29