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Ultimate IMAP Client Library for Android, iOS, and .NET CF

Easily manage, download, search, and process mails and folders on IMAP4 servers.

The Ultimate IMAP component is a part of the Mail Component which offers a comprehensive interface for downloading e-mail messages from a server and managing your mailbox remotely, all from within your application. In addition, it also allows you to compose, decrypt, encrypt, sign, and validate email messages.

If you need Ultimate IMAP for both .NET Framework and Mobile, visit Ultimate IMAP for .NET.


Downloading and managing email messages and mailboxes easily

The IMAP component offers a comprehensive interface for IMAP, providing the developer with everything that he needs to incorporate mail management tasks in an application as listed below:

  • Connect to standard IMAP server or secure IMAP server over TLS/SSL. It supports both Implicit and Explicit security modes
  • List email messages
  • Download entire or partial messages to a disk file or stream
  • Upload messages stored in a file or memory stream
  • Copy messages
  • Delete messages
  • Purge messages
  • Move messages between folders/mailboxes
  • Mark/unmark message flags
  • Listing mailboxes/folders
  • Create mailboxes/folders
  • Rename mailboxes/folders
  • Delete mailboxes/folders
  • Subscribe and unsubscribe mailboxes/folders
  • Obtain mailbox information
  • Search messages with advanced options
  • Authenticate securely with CRAM-MD5, DIGEST-MD5, NTLM, and Kerberos methods

Supports MIME and S/MIME

When designing the IMAP component, we mainly forcus on ease-of-use, performance, reliability, and flexibility. As a benefit, you do not need to have deep knowledge of how the IMAP protocol is implemented and how to read, encrypt, decrypt, sign and validate a message. IMAP component does all the hard works for you. The following is a list of some key MIME and S/MIME features:

  • Load and save message from/into MailMessage object
  • Supports multiple recipients with To, CC, and BCC headers
  • Attach multiple files
  • Encrypt, decrypt, sign, and validate email messages easily
  • Extract attachments from MS-TNEF (winmail.dat) files
  • Import HTML file or web page into e-mail
  • Forward message as attachment
  • Base64 and Quoted-Printable
  • Fullly support creating and displaying HTML messages with embedded resources such as Image, source, etc. in your applications

Security and Reliability

The Ultimate IMAP component provides industry standard security using the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols. Our components support strong, commercial grade encryption, and we do not rely on any third-party toolkits which have licensing restrictions or are encumbered by patents. By setting a single property or option, the component automatically handles all of the complex certificate management, protocol negotiation and encryption for you. Even advanced options, such as using client certificates, are handled easily with just a few lines of code.


Supports HTTP Connect, SOCKS4, SOCKS4A & SOCKS5 Proxy Servers

Ultimate IMAP provides full support for Proxy Servers such as HTTP CONNECT, SOCKS4, SOCKS4A, and SOCKS5. By simply setting a few properties, you are able to download, upload, and manage email messages and mailboxes from IMAP servers through the desired proxy server, providing your application with the greatest flexibility and highest level of security available.


Support for IPv6, the next generation Internet protocol

IPv6 (Internet Protocol version 6), the next-generation protocol designed by the IETF (Internet Engineering Task Force), will gradually replace the current version of the Internet Protocol, IPv4.

With Ultimate IMAP Component, users have an integrated service assurance solution that will provide them with IMAP, and Proxy capabilities in mixed IPv4 and IPv6 environments. This helps organizations with the adoption of and the transition to IPv6 by making the management of such networks seamless.


.NET CF Technology

By using 100% managed code written in C#, the Ultimate IMAP component takes advantage of the numerous built-in features of the .NET Compact Framework to enhance performance, moreover, the component is CLS compliant, and it does not use any unsafe blocks for minimal permission requirements.


Supports many .NET Platforms

Ultimate IMAP is fully compatible with Visual Studio 2005 to 2013 (.NET 2.0 to .NET 4.5.1). As a benefit, you are always up-to-date with Microsoft's Technologies when using our products.


Supports event-driven (Asynchronous) and blocking (Synchronous) Design

Most applications written with the IMAP component will be synchronous. Synchronous method gives you the ease-of-use, but it can only returns the control back to the caller after it has finished, meaning that it blocks the execution of the caller for a period of time. Using synchronous method is recommended when you only need to execute one IMAP operation at a time.

You might decide that your design requires an asynchronous operation when it is needed to manage email messages simultaneously. Asynchronous methods provide a great deal of power. Asynchronous method is executed on a thread separate from the calling thread. Such operation is useful when an IMAP operation is time consuming and other codes need to execute without waiting for the initial operation to complete. In addition, the user interface will be most responsive when asynchronous methods are used.



The IMAP component has been designed with a great degree of flexibility and can be used with a wide variety of programming languages and different types of development environments. Available as a managed .NET CF class, it is fully supported by languages such as Visual Basic, Visual C#, J#, Managed C++, Borland C# Builder, and Delphi.


Fully Documented

As important as functionality, features and stability are, comprehensive documentation is equally as important to the application developer. This is why the ComponentPro IMAP for .NET CF product includes a Developer's Guide and a complete Technical Reference which documents every property, method and event supported by the component. A printable version of the documentation is included with the product, as well as context-sensitive online help which can be accessed directly from within the development environment.


Lots of complete IMAP client samples in C# and VB.NET

In addition to the fully documented Developer's Guide and a complete Technical Reference, Ultimate IMAP component also includes a number of samples with full source code which help you become familiar with the features of the component and provide code which you can re-use in your own applications.



ComponentPro understands today's software development requirements which often require support for multiple operating systems and different programming languages. As with all ComponentPro components, the product is licensed to a single developer, and applications built using the IMAP component can be redistributed to as many end-users as needed without additional royalties or runtime licensing fees. Developers are also permitted to install the product on different development systems as long as they are the only one using it and there is no chance that it can be used by more than one developer at the same time.



I am impressed with the components in the Ultimate Studio package. I have been developing a commercial desktop application employing virtually all of components, I have found them to be amazing, easy to use and loaded with many features.
Peter Windsor - Senior Software Developer Allocate Software
I have been a user of Ultimate Studio package for more than 3 months. Their components are powerful and flexible. I rate them 5 star for the developer support.
Chris Calzaretta - Senior Software Developer Quantesys

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