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Citadel Alternatives

Citadel Alternatives

Citadel

Is a collaboration suite (messaging and groupware). It is designed to run on open source operating systems such as Linux or BSD. In order to modernize the Citadel platform for the Internet, the Citadel/UX developers added functionality such as shared calendars, instant messaging, and built-in implementations of Internet protocols such as SMTP, IMAP, Sieve, POP3, GroupDAV and XMPP. All protocols offer OpenSSL encryption for additional security.

Users of Citadel/UX systems also have available to them a web-based user interface which employs Ajax style functionality to allow application-like interaction with the system.

Citadel uses the Berkeley DB database for all of its data stores, including the message base.

Best Commercial Citadel Alternatives

Are you curious what software is like Citadel? Check out different, popular Citadel alternatives that fit with your device. Are there other programs like Citadel? Let's find out!

MDaemon Messaging Server

MDaemon Messaging Server

CommercialWindows

Low cost, easy to use Email Server software for virtual, on-premise, or hosted deployments for companies that want control of their email. Integrated web-mail with doc...

Features:

  • Dropbox integration
  • Encrypted Email
  • Group chat
  • Support for IMAP
  • Email Server
  • Mobile Device Management
  • Outlook integration
Microsoft Exchange Server

Microsoft Exchange Server

CommercialWindowsWeb

Intelligent inbox and calendar software that's a part of the Microsoft Office Suite.

Features:

  • Email Server
  • Real time collaboration
Zarafa

Zarafa

CommercialMacWindowsLinuxWeb

Open Source Collaboration, providing integration with your existing Linux mailserver, native mobile phone support, Outlook "Look & Feel" webaccess and...

Features:

  • Email Server
  • Real time collaboration
Atmail Email Server

Atmail Email Server

CommercialLinuxWeb

Atmail webmail system offers a webmail client, email server platform and mailserver appliance for Linux, Unix and Windows. Features: Webmail Calendar Addressbook ...

Features:

  • File sharing
  • File-sync
  • Group Mail
  • Email Server
iMail

iMail

CommercialWindowsSelf-Hosted

Fast, safe, heavy mail solution. Web-client access, LAN or WAN self-hosted server, maintenance-free design. No Windows server and database server required, unlimited...

Sanwhole Exchange

Sanwhole Exchange

CommercialWindows

Sanwhole Exchange is a server running iMail, iPress and iStore services. iMail is an enterprise-class email server does Microsoft Exchange and Gmail work. iPress sets...

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