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S/MIME Message

Features | Detailed Description

The S/MIME Message is a component from the Clever Internet Suite library.
It allows you to create / parse messages in an alternative MIME format with Attachments and digitally Sign / Verify, Encrypt / Decrypt them according to the S/MIME standard: RFC 2311, RFC 2633 and RFC 2045.

Available in .NET, VCL and ActiveX editions.


  • Load and Save MIME messages
  • Sign / Verify, Encrypt / Decrypt
  • Extract message Certificates
  • X.509 digital certificates
  • Text and HTML message bodies, Attachments and Embedded pictures
  • Can be used with any third party SMTP, POP3 or IMAP components
  • Free one year upgrades and support

Generate and Verify RSA digital signatures using a single line of code

// [Delphi]
clSMimeMessage1.BuildMessage('Message Text', ['']);


// [C#]
using(StreamReader sr = new StreamReader("c:\\signed message.eml")) {
   smimeMessage1.MessageSource = StringUtils.GetStringArray(sr.ReadToEnd());


Sign and Encrypt simultaneously

The SMimeMessage component allows you to sign and encrypt messages simultaneously. You can verify both enveloped and detached RSA digital signatures for signed and encrypted messages.

// [Delphi]
clSMimeMessage1.BuildMessage('Message Text', '<html><body>Message Text</body></html>');


// [C#]

Samples, including WinForm clients with full source code

Please see the Demos code (SMime) and also the indexed Help documentation provided with the Clever Internet Suite installation to learn more about using this component in your application.

Includes support for Delphi, C++Builder, C#, VB.NET and Javascript.

Complete Delphi and C# source code

When Purchasing the Clever Internet Suite you receive the full sources for all suite components and also free unlimited support.


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