What is "mailsite"

MailSite is a commercial mail server, calendar software, contact manager and collaborative software developed by Rockliffe Systems. MailSite was one of the first mail servers to run on Microsoft Windows NT using Internet Standards when version 1.2 was released in 1996. MailSite has been in continual development since 1996 with version 10 released in 2013. MailSite runs on a single Microsoft Windows Server or a cluster of Microsoft Windows Servers. MailSite works natively with Microsoft Outlook [1] versions 2007 to 2013 for mail, calendar and contacts without requiring any Outlook plug-ins. MailSite includes an Exchange ActiveSync (EAS) server for synchronizing mail, calendar and contacts with mobile devices. MailSite also works with Internet Standards-based mail clients such as Mozilla Thunderbird.