Outlook, Exchange, and Extended MAPI developer library

Outlook Redemption

Use Extended MAPI, Outlook UI, and Exchange service APIs from any COM-capable language.

Build Outlook and Exchange solutions beyond the Outlook Object Model, including stores, folders, messages, profiles, MAPI tables, rules, properties, message import/export, Outlook windows, and selected EWS and Graph interop scenarios.

Download Redemption RDO documentation Safe* Objects

Outlook 98 through 2024
Microsoft 365 classic Outlook
32-bit and 64-bit
COM, VBA, .NET, Delphi, C++, script

Extend Outlook data access beyond the Outlook Object Model

Redemption is a regular COM library available to any language that can use COM objects. It exposes automation-friendly objects for Outlook and Exchange development, using Extended MAPI, Outlook UI access, and Exchange service APIs where they fit.

The library includes RDO, Safe*Item objects, ProfMan, MAPI tables, store and folder access, message import/export, account management, Exchange rules, ACLs, reminders, and categories.

For existing Outlook Object Model code, Safe*Item objects provide a minimal-change path around legacy security prompts and expose additional properties such as message headers, sender email addresses, RTF body, and attachment data.

Start with the object family that matches your code

Redemption has several related API areas. These are the main entry points for new and existing integrations.

RDO Use Redemption Data Objects in addition to, or instead of, the Outlook Object Model when you need lower-level Outlook, Exchange, and MAPI access. Safe*Item objects Wrap Outlook items and access blocked or missing properties with minimal code changes. ProfMan Create, inspect, and configure MAPI profiles, services, providers, and profile sections.

RDO

A complete automation-friendly MAPI object model

RDO exposes sessions, stores, folders, items, recipients, attachments, rules, search folders, accounts, categories, reminders, and low-level properties without requiring your code to automate Outlook for every operation.

It can share Outlook's active MAPI session through RDOSession.MAPIOBJECT, or it can log on directly to an existing profile, a PST store, or a hosted Exchange mailbox.

Introduction to RDOCore concepts, logon options, and migration notes.
RDOSessionThe main creatable RDO object.
RDOMailMessages, derived item types, and message operations.
RDO object indexAll RDO objects, collections, and related reference pages.

Safe* Objects

Keep existing Outlook code and remove the blocked-property pain

Safe*Item objects are designed to sit beside existing Outlook Object Model code. Assign the Outlook item to the Redemption object and continue working with the same familiar properties and methods, including properties Outlook blocks or omits.

Safe* object overviewHow the wrapper objects work.
Safe* examplesCommon mail, contact, import/export, and field access examples.
SafeMailItemThe main mail-item wrapper.
Safe* object indexAll Safe* wrappers and their member reference pages.

Developer resources

Deployment, MAPI tables, FAQ, and release history

Use these pages when you need registration and RedemptionLoader guidance, MAPI table details, troubleshooting notes, or version-specific changes.

Registration and RedemptionLoaderDeployment, bitness, security, and registry-free loading notes.
MAPI TablesTable access and filtering support.
FAQTroubleshooting, compatibility, and common integration questions.
Version historyRelease notes and version changes.

For developers already using OutlookSpy: OutlookSpy shows what Outlook and MAPI expose at runtime. Redemption gives your code an automation-friendly way to read, write, and move that data.