Outlook holds a lot of icons to indicate different item types and other item properties. Below you’ll find a long list of these icons and their meaning.
- Meeting Messages
- Calendar
- Contacts
- Tasks
- Journal
- Folders
- General
- Security
- Flags
- Non-Native (added via custom forms or add-ins)
 | Unread Message |
 | Unread Signed Message |
 | Unread Encrypted Message |
 | Read Message |
 | Read Signed Message |
 | Read Encrypted Message |
 | Draft |
 | Sending Message |
 | Forwarded Message |
 | Forwarded Signed Message |
 | Forwarded Encrypted Message |
 | Replied on Message |
 | Replied on Signed Message |
 | Replied on Encrypted Message |
 | Out Of Office Message |
 | Message Recall Request |
 | Message Recall Failure Report |
 | Message Recall Successful Report |
 | Multimedia Message (can I get a repro?) |
 | Delivery Report |
 | Non Delivery Report |
 | Message Deleted Without Being Read Notice |
 | Message Read Notice |
 | Secure Receipt |
 | Post |
 | Replied on Post |
 | Message Holds (Receipts) Tracking Tab (Outlook 2003 and previous) |
 | Message Holds (Receipts) Tracking Tab (Outlook 2007 and Outlook 2010) |
Meeting Messages
 | Meeting Request |
 | Accepted Meeting Request |
 | Cancelled Meeting Request |
 | Can I get a repro? |
 | Declined Meeting Request |
 | Tentative Meeting Request |
Calendar
 | Recurring Item |
 | Exception to Recurring Item |
 | Data Conflict |
 | Start Time of an Appointment or Meeting |
 | End Time of an Appointment or Meeting |
 | All Day Event |
 | Scheduled Meeting |
 | Private Item |
 | A Reminder is Associated with this Item |
 | A Meeting Workspace is Associated with this Item |
 | A File Attachment is Associated with this Item |
 | More Items |
Contacts
 | Contact |
 | Contact with Journaling enabled |
 | Distribution List (Outlook 2003 and previous) |
 | Distribution List / Contact Group (Outlook 2007 and Outlook 2010) |
Tasks
 | Task |
 | Delegated Task |
 | Received Task |
 | Recurring Task |
 | Accepted Task |
 | Declined Task |
 | Task Request |
Journal
For an overview of journal items click here.
Folders
 | Main mailbox store (holds the Outlook Today screen) |
 | Extra data store such as pst-file, mailbox, Public Folders, SharePoint etc… |
 | Inbox |
 | Drafts |
 | Sent Items |
 | Deleted Items |
 | Junk E-mail |
 | Outbox |
 | Folder |
 | Shared folder in your mailbox |
 | Shared folder you are connected to and thus not in your own mailbox (more info) |
 | Search Folder |
 | Inactive Search Folder (click on it to activate) |
 | Conflicts folder in Sync Issues |
 | Failures folder in Sync Issues |
 | RSS Feeds |
 | Calendar |
 | Contacts |
 | Tasks |
 | Notes |
 | Journal |
General
 | High Importance |
 | Low Importance |
 | Attachment |
 | Unresolved |
 | 1 Off; something is screwed up |
 | Sticky Note |
Security (icon shown in Message)
 | Invalid Signature |
 | Encrypted |
 | Valid Signature |
 | Unknown Signature |
 | Signature Warning |
Flags (Outlook 2003)
 | No Follow Up Flag |
 | Red Follow Up Flag |
 | Blue Follow Up Flag |
 | Yellow Follow Up Flag |
 | Green Follow Up Flag |
 | Orange Follow Up Flag |
 | Purple Follow Up Flag |
 | Follow Up Completed |
Non-Native (added via custom forms or add-ins)
 | Appointment created via the Live Search Maps Add-In for Outlook |
 | Archived message via an Exchange level archiving solution |
 | Spam message indicated via a 3rd party anti-spam solution |
