Apps similar to Mailsite include Nextcloud Hub, which is free and open source. Other options are Microsoft Exchange, OpenChange, IceWarp and iMail. In total there are seven Mail Servers like Mailsite for Windows, the web, self-hosting, Linux and Android.
Nextcloud is the most deployed on-premises file share and collaboration platform. Access & collaborate across your devices. As fully on-premises solution, Nextcloud Hub provides the benefits of online collaboration without the compliance and security risks.
Germany
EU
Exchange business-class email helps increase user productivity while protecting your data. Get it as a hosted service or run it on your servers.
United States
OpenChange aims to provide a portable Open Source implementation of Microsoft Exchange Server and Exchange protocols.
All-in-one European business email and collaboration platform — email, chat, video conferencing, and office suite in one app. Cloud or self-hosted.
CzechiaEU
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 mail accounts, storage, attachment size, custom logo. Free for commercial use.
China
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.
China
Hosted Exchange solutions from Netrepid - the best hosted exchange provider. Accelerate your technology at on demand speed.
