Rebex Secure Mail for .NET Features

• SMTP and PickupDirectory for sending emails - Send a message using a single line of code. TLS/SSL support. Direct sending to recipient's SMTP server.
• IMAP for advanced mailbox access - Upload and download messages using IMAP protocol. TLS/SSL support. Work with email folders. Multiple message operations - copy, delete, or set flags for a range of messages in a single operation. Search for messages with specific attributes.
• EWS for sending and receiving emails using Exchange - Upload and download messages using Exchange Web Services. TLS/SSL support. Work with email folders. Multiple message operations - copy, delete, or set flags for a range of messages in a single operation. Search for messages with specific attributes. Send emails using EWS.
• POP3 for email retrieval - Retrieve messages using a simple POP3 protocol. TLS/SSL support. Retrieve message lists with size, sequence number, unique ID or headers.
• Easy-to-use API - Connect, log in, search for new messages, download messages, disconnect. Send email with attachments. It's easy to start developing with our library. Simple code for common use cases.
• Lots of sample code
  • Easy-to-use API examples
  • Tutorials
  • Samples
• Signed and encrypted emails (S/MIME) - Supports message encryption and decryption. Supports signing and signature validation. Based on X.509 certificates and Cryptographic Message Syntax.
• RSA/OAEP and RSA/PSS on all platforms - Use RSASSA-PSS signatures and RSAES-OAEP encryption with SHA-1, SHA-256, SHA-384 or SHA-512 on all supported platforms including .NET Framework 2.0 and .NET Compact Framework.
• Up-to-date TLS support - Rebex Secure Mail supports modern TLS versions on all mainstream platforms. This ensures that your emails are transfered securely and reliably. Rebex Secure Mail supports both implicit or explicit TLS/SSL and provides a rich set of security features. You'll find APIs for TLS/SSL security, X.509 certificates, and more.
  • TLS 1.3 on mainstream platforms including .NET 3.5-4.8 on Windows 7 (or Windows XP SP3 with plugins)
  • TLS 1.2, 1.1, 1.0 on all platforms (including .NET Compact Framework 3.5/3.9)
  • Elliptic Curve DSA and Elliptic Curve Diffie-Hellman ciphers (requires a plugin on some platforms)
  • AES/GCM ciphers
  • Elliptic Curve DSA and Elliptic Curve Diffie-Hellman ciphers (requires plugin on some platforms)
  • SHA-2 certificates
  • SHA-2 hashing algorithms
  • Server Name Indication (SNI) extension
  • Renegotiation Indication extension
  • Support for legacy SSL 3.0 protocol
• Many, many more time-tested features - Rebex Secure Mail is a mature and stable component maintained since 2006.
  • Task-based Asynchronous API (.NET 4 or later)
  • Automated (or custom) certificate validation
  • Sending raw POP3/SMTP/IMAP commands
  • Sending email on behalf of another user
  • Logging all communication with the server
  • Ability to use Secure Mail in SSIS, SQL CLR and PowerShell
  • FIPS 140-2 compliant mode