Features (EN) RackCorp UMS is feature-rich, made for multi-tenanted environments such as ISPs, Managed Service Providers, Governments, and multinationals who need to run multiple tenancies within a hosted environment. Feature Available / Description Multi-domain Unlimited domains allowed Contacts Unlimited Contacts allowed Calendar Unlimited Calendars allowed Tasks Unlimited Tasks allowed Full-Text Search (including attachments) Yes (v 1.3+) Attachment Preview Yes (Text, Images, some other) POP/IMAP/SMTP Support Yes (Encrypted versions of these protocols, optional to turn on unencrypted) Deleted Items / Trash Yes (default 30 days) Granular account access control Disable deleting / sending emails vs read-only access Auto-responder Yes Server-side mail sort Yes, using sieve mail filters (configurable from web) Scalable Active-active topology allows massive scaling Fault Tolerance Node auto-sync, multi-site, load balanced Delivery notifications Yes (where supported by recipient) Global Address Book Yes CardDAV, CalDav, iCal Support Yes, Yes, Yes! LDAPS integration Yes Attachment / Spam Filtering Block attachments based on extension / type Anti-Spam Anti-Virus Greylisting Powerful admin spam hold / release functionality for large volumes of emails Language Support English (EN) Russian (RU) Mongolian (MN) Smart Storage Reduce your storage costs for unified messaging and emails by using tiers of storage IMAP Emails and Attachments can be stored on CIFS/NFS/S3 after idle accesses to them. Cloud Files can be stored on CIFS/NFS/S3 Calendar Sharing Rich Calendar functionality, ability to create events, share events, and share calendar information between users Collaboration between employees is made easy: Task Management Task lists can be created and managed via the same interface Cloud Storage Save / Upload The RackCorp UMS has a very useful cloud storage capability built-in the the web interface, and includes mobile apps for IOS and Android.  Using this interface, a user can very quickly and easily access their stored cloud files, while also having powerful tools available for synchronising their cloud storage to personal laptops / desktops. Viewing Cloud Storage Saving Email Attachments Directly to Cloud Storage Uploading Attachments Directly From Cloud Storage Creating Documents Directly in Cloud Storage Sharing Documents with internal users Mobile Apps For Easy File Access Windows Desktop Sync App