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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 Citadel Alternatives for Windows

Are you still using Citadel? Let's compare it to the best other options below. Maybe one of these Citadel alternatives will work on your device, too.

hMail Server

hMail Server

FreeOpen SourceWindows

hMailServer is a free e-mail server for Microsoft Windows. Its used by Internet service providers, companies, governments, schools and enthusiasts in all parts of the...

Features:

  • Convert images to PDF
  • Support for IMAP
  • Email Server
  • POP3 Support
  • SMTP
  • SMTP integration
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
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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