Cross-Application:

• -Drag/Drop with drag context
• -Auto-complete addresses
• -Ability to render and create messages, appointments, and web documents in HTML format
• -Spell check
• -Mini dialog for quick actions (e.g. send message, create appointment) without changing the underlying application context
• -Ability to choose from users in personal Address Books, shared Address Books, or the -Global Address List
• -Users can create custom shortcut keys for folders, tags, and saved search from their Options page

Mail:

• -Automatic grouping of messages in a message thread, enabling efficient message organization
• -Conversations are formed independently of folders, meaning that messages in different folders can be part of the same conversation
• -If a message is contributed to a conversation, that conversation is marked as unread and moved to the top of the Inbox
• -Ability to perform actions on an entire conversation such as move, Tag, flag, drag/drop, etc.
• -Ability to view a highlighted message in a preview pane
• -Ability to create personal folders and folder hierarchies
• -Ability to subscribe to RSS/ATOM feeds
• -Ability to print a message and see a print preview
• -Ability to sort messages based on subject, date, or sender
• -Ability to flag/unflag messages/conversations for follow up
• -Ability to define filter rules and priorities for incoming messages
• -Option to popup a separate window when composing a message
• -Option to popup a separate window when composing a message
• -Ability to enable/disable a custom away message
• -Ability to save in-progress messages to a Drafts folder
• -Ability for a user to set an automatic forwarding address and choose whether to leave a copy in the primary mailbox
• -Option to Reply or Reply-All while retaining the attachments from the original message
• -Right-clicking a message displays a menu of actions to take on that message (e.g. Mark Read, Reply, Delete)
• -Right-clicking an email address displays a menu of actions to take on that address (e.g. view website, add/edit contact, create filter, search for messages)
• -Hovering over an image attachment in a message displays a thumbnail preview of the image
• -Ability to drag a message to a mini-calendar date to create an appointment based on the message
• -Visual indicator of quota and amount of quota consumed
• -Ability to export a set of messages as a ZIP file
• -Ability to toggle between Reply and Reply-All while composing a reply

Address book:

• -Business card view of Contacts
• -List view of Contacts with preview pane
• -Ability to import/export Contacts in .csv format
• -Ability to import/export contacts in vCard (.vcf) format
• -Ability to print a single Contact or list of Contacts and see a print preview
• -Right-clicking a Contact displays a menu of actions to take on the Contact (e.g. compose message, search for messages)
• -Ability to drag a Contact to a mini-calendar date to create an appointment with that Contact
• -Ability to create multiple Address Books in a single mailbox
• -Ability to move/copy contacts from one Address Book to another (based on access privileges)
• -Ability to create group contact lists in their user Address Books

Calendar:

• -Ability to schedule personal appointments
• -Ability to schedule meetings and view attendees' free/busy information
• -Ability to create recurring meetings and exceptions to recurring meetings
• -Ability to book resources (locations, equipment, etc.) for a meeting
• -Ability to search for available resources by attributes such as site, building, floor, and capacity
• -Option to enable an alert popup for upcoming appointments
• -Appointments/schedules are automatically displayed in the users current time zone
• -Ability to set an explicit time zone for an appointment
• -Ability to view calendars in Day, Week, Work Week, or Month views
• -User setting for the first day of the week; value chosen impacts the Week calendar view
• -Ability to create an appointment and/or drag an appointment's boundaries inline in calendar views
• -Ability to quickly mark Accept/Tentative/Decline from calendar views
• -Declined appointments display faded so that the user remains aware of their occurrence
• -Ability to print calendars in day, week, work week, or month views and see a print preview
• -Ability to print calendars in day, week, work week, or month views and see a print preview
• -Option to display a miniature calendar at all times
• -Hovering over a date in the mini-cal displays calendar information for that date
• -Right-clicking on the mini-cal displays a menu of actions to take on the associated date (e.g. add appointment, search for messages)
• -Ability for a user to create multiple calendars within a single account
• -Ability for a user to designate which calendars will be included in the user's free/busy calculations
• -Ability to subscribe to an external calendar in iCalendar (.ics) format
• -Ability for a user to view multiple calendars overlayed in the same view, which each calendar optionally represented by a different color
• -When viewing multiple calendars, option to view a "thermometer" that indicates the degree of conflict at each potential time slot

Search:

• -Fast and efficient search from the web interface
• -Ability for a search to include any number of conditions combined via Boolean-like expressions (AND, OR, NOT, etc.)
• -Ability to use text commands to execute searches
• -Advanced interface for building searches
• -Ability to search for a specific item type (Mail, Contacts, Documents, etc.) or across item types
• -Ability to search using a prefix plus a wildcard
• -When using Search Builder, the search result set updates continuously as search conditions are changed
• -Ability to save searches for subsequent one-click re-execution

Security:

• -The AMS natively includes Spam Assassin and the DSPAM filter for spam protection
• -Messages that users mark as Junk / Not Junk are automatically fed into the spam training engine
• -The AMS natively includes Clam AntiVirus for virus protection
• -Ability to block attachments based on criteria such as attachment type or size
• -Ability to enforce that attachments be viewed as HTML, enabling risk-free attachment viewing without requiring attachment-native applications on the viewer's machine

• Freedom of Client Choice
• Browser - Zimbra Ajax client
• PC Client - Outlook (Online, Offline, Cached Mode), Apple Mail and iCal, Eudora, Evolution, Thunderbird/Sunbird, RSS, etc.
• Mobile - Wireless devices "over the air" synchronization: Blackberry (via partner solutions), Palm, Nokia, Motorola, Good, PocketPC, etc.
• Self-Organizing Mailboxes
• Powerful, fast search (including messages and attachments)
• Saved searches across folders
• Conversation views across folders
• Filters
• Comprehensive Calendaring
• Group scheduling with free/busy management and controls
• Multiple calendars per user
• Calendar delegation and sharing
• Multi-calendar views
• Subscribe to external calendars in .ics format
• Extensible model for linking message content to external web services and applications (expressable via hover-over and/or click)
• Intranet - ERP, CRM, Support, Finance, HR, VoIP phone, etc.
• Internet - Google/Yahoo Maps, Skype, Travel, Package Tracking, etc.
• Efficient context switching
• Quickly view/create calendar appointments while in mail
• Quickly create/edit contacts while in mail
• Quickly view sender's website while in mail
• Any Place, Any Machine
• Rich, zero footprint, AJAX-based end-user interface (cross browser/OS)
• Security sans VPN
• Secure, read-only access to attachments without special-purpose client software
• Modern collaboration styles/formats
• RSS/ATOM feeds
• Tags