DeskNow is described as 'Fully featured and easy to use mail and collaboration server with build-in antivirus and antispam. SyncML for mobile devices is separately licensed' and is a Mail Server in the online services category. There are seven alternatives to DeskNow for a variety of platforms, including Web-based, Self-Hosted, Linux, Windows and Mac apps. The best DeskNow alternative is Zentyal. It's not free, so if you're looking for a free alternative, you could try OX App Suite. Other great apps like DeskNow are Zimbra Collaboration Suite, Microsoft Exchange, CrossBox and Zarafa.
Integrates native Active Directory and all essential network services, including domain, mail, gateway, infrastructure, and security roles, for SMBs, offering web-based management, centralized authentication, file server, VPN, and firewall in a single Linux platform.
Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more. With the most innovative web application available today, Zimbra boosts the productivity of users on any desktop and dramatically reduces TCO compared to legacy platform vendors.
Exchange business-class email helps increase user productivity while protecting your data. Get it as a hosted service or run it on your servers.
The OX App Suite by Open-Xchange is web-based platform offering a suite of apps like an email client, calendar, contacts magement, cloud storage with synchronization and productivity apps for word processing, spreadsheets and presentations.
Real-time email, chat, audio/video calls & conferences, file-sharing, and contacts app with a modern and intuitive UI.
Open Source Collaboration, providing integration with your existing Linux mailserver, native mobile phone support, Outlook "Look & Feel" webaccess and stable Outlook sharing (100% MAPI).
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 blog, forums and tickets in one. iStore is an online store.
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