OEAPI Overview


Outlook Express Application Programming Interface is a Software Development Kit (SDK) used in Fortune 100 companies to build plugins for Outlook Express® and Windows Mail®. Nektra's services includes Windows Live Mail using our Windows Live Mail® API technology.

Used by the Top Security Vendors

We are pleased to have customers that are the Leaders in the Quadrant of Gartner's Endpoint Protection Platforms.

You can read the full report on the Symantec Endpoint Security's page.

Most of our enterprise customers have a special branch of the OEAPI that specially fits to their needs. This warranties them better performance and dedicated support.

OEAPI enables your software to reach over 400 million users worlwide with Outlook Express® and Windows Mail® already installed.


Our customers have been using OEAPI for a wide range of applications:

  • Anti Spam & Anti Phishing
  • Automatic encryption of emails
  • Anti Virus
  • Integration with Web 2.0 sites
  • Customer Relationship Management (CRM) (i.e: Salesforce AppExchange, vTiger, SugarCRM)
  • Contacts synchronization & backup

OEAPI component has support for GUI customization, Messages management, MIME handling and many other useful features.

Take a look at the OEAPI Features that fit your needs.

OEAPI's Documentation

You can see a description of the ActiveX interfaces on the Product's Documentation.

Customize your GUI

OEAPI enables you to extend Outlook Express & Windows Mail graphical user interface placing your own controls like:

  • Custom Toolbars.
  • Custom Buttons.
  • Custom Menu items.

You can bind them to events in your application.

Most programming languages

You can develop your product using a wide range of languages supporting COM/ActiveX technologies.

    • Visual C++ (ATL/Comet)
    • .NET (C# / VB.NET)
    • Java
    • VB6, Perl/PHP/Ruby/Python

Take advantage of the OEAPI versatility.

Easy Messages Management

Manage messages in MIME format through our useful interface that supports:

  • Attachments
  • MIME bodies handling
  • Modifying custom and standard
  • Properties & headers(i.e: Subject, To, From)
  • Minimize the complexity of messages structures with OEAPI.