Rebex Secure Mail for .NET 新版本發表

Released: Nov 8, 2022

R6.9 中的更新


  • Added support for Microsoft .NET 7 - This release adds a new set of binaries targeting .NET 7. It supports all .NET 7 platforms:
    • Microsoft Windows (x64, x86, ARM64).
    • Linux (x64, ARM32, ARM64).
    • Apple macOS (x64).
    • Android.
    • Apple tvOS.
  • IMAP: Added support for SPECIAL-USE extension.


  • Cryptography: Fixed SHA-2 support on pre-SP3 versions of Windows XP.

Released: Oct 25, 2022

R6.8 中的更新


  • EWS: Improved handling of unexpected error responses.
  • Networking: Improved handling of timeouts during TCP connections.
  • TLS Core: Optimized TLS 1.3 core.
  • TLS Core: Improved handling of invalid TLS 1.3 session tickets (PSKs).
  • TLS Core: Reduced memory footprint and CPU usage of TLS 1.3.
  • Cryptography: Added SSE2 implementation of ChaCha20 for Microsoft .NET 5.0 or higher.


  • TLS Core: Fixed handling of incomplete TLS 1.3 records.

Released: Oct 5, 2022

R6.7 中的更新


  • All: This release is now properly code-signed again. TSA certificate validity was too short in R6.6 due to DigiCert's mistake.
  • MIME: Added workaround for yet another form of wrong Content-Disposition parameter encoding.
  • SSH: Added workaround for SSH servers that claim to prefer 'ssh-rsa' for client public key authentication.

Released: Sep 16, 2022

R6.6 中的更新


  • EWS: Added support for more variants of Microsoft Office 365 error responses.
  • EWS: Enabled TLS session resumption.
  • EWS: Improved error reporting (in the log and via EwsException).
  • SSH: Added new constructors to SshPrivateKey/SshPublicKey classes that accept AsymmetricKeyAlgorithm.
  • SSH: Added support for ECDSA to SshPrivateKey(AsymmetricAlgorithm) constructor (on Microsoft .NET Core 3.1 or higher).
  • TLS Core: Added support for Microsoft Windows Extended Protection (only available on Windows) to...

Released: Jul 15, 2022

R6.5 中的更新


  • EWS: Added EwsSettings.ExpectContinueTimeout to make it possible to specify a timeout for '100 Continue' HTTP response.
  • SSH: Added support for 'server-sig-algs' SSH extension (RFC 8332).
  • SSH: Improved logging of 'partial success' authentication responses.
  • TLS Core: Added support for TLS extended master secret extension (RFC 7627).
  • Common: Improved internal asynchronous infrastructure for old platforms.


  • POP3: Fixed an issue in handling OAuth 2.0 authentication errors.
  • TLS Core: Fixed...

Released: May 25, 2022

R6.4 中的更新


  • Added support for Microsoft .NET 6.0 on Android and Apple iOS.
  • MIME: Date header parser has been made more benevolent.
  • SSH: Optimized AEAD ciphers in SSH - ChaCha20/Poly1305 and AES/GCM ciphers have been slightly optimized.
  • TLS Core: Optimized AEAD ciphers in TLS - ChaCha20/Poly1305 and AES/GCM ciphers have been slightly optimized.
  • TLS Core: Optimized CPU usage in TLS 1.3 data flow.
  • TLS Core: Optimized scenarios when the remote party requires TLS 1.2 (or lower TLS version) and TLS 1.3 is...

Released: Mar 28, 2022

R6.3 中的更新


  • Mail: Added workaround for TNEF (Transport Neutral Encapsulation Format) attachments with empty ContentId.
  • Networking: Added ProxySocket.Bind(Socket) protected method to allow for more customization.
  • SSH: Improved workaround for very old versions of Bitvise server that don't properly handle SSH channel closing.
  • TLS Core: Added TlsSocket.CloseAsync method (alias for DisposeAsync method).
  • TLS Core: Improved protocol mismatch detection.
  • TLS Core: Optimized asynchronous Send/Receive operation in...

Released: Jan 24, 2022

R6.2 中的更新


  • EWS: Improved handling of future Microsoft Office 365 error codes.
  • TLS Core: Optimized temporary object usage in TLS 1.3 Send/Receive methods.


  • Networking: Fixed timeout handling during name resolution.
  • TLS Core: Fixed handling of TLS 1.3 signature_algorithms_cert extension.
  • Cryptography: Fixed releasing of CNG handles in AES/GCM interop (issue only present in R6.1 on Windows).

Released: Jan 8, 2022

R6.1 中的更新


  • Mail: Added UseDefaultCharsetForHeaders option to MailSettings and MimeOptions.
  • TLS Core: Optimized receive operation in TLS 1.3.
  • TLS Core: Slight optimizations in TLS 1.3 on modern platforms.
  • Cryptography: Improved caching of CNG algorithm provider handles.
  • Cryptography: Optimized symmetric branch of Microsoft Windows CNG (BCrypt) interop layer.


  • All: Fixed compatibility of Rebex binaries for .NET Framework 4.0 with ASP.NET 4.5 or higher.
  • Cryptography: Fixed Certificate...

Released: Nov 25, 2021

R6.0 中的更新


  • All: Added a new set of binaries targeting Microsoft .NET 6.0. Including:
    • Microsoft Windows (x64, x86, ARM64).
    • Linux (x64, ARM32, ARM64).
    • Apple macOS (x64).
  • All: Removed several obsolete and deprecated APIs.
  • All: Removed support for legacy ISerializable interface from binaries for Microsoft .NET Standard.
  • MIME: Changed default charset for MIME text entities to UTF-8.
  • SMTP: Disabled deprecated SmtpDelieryEngine.System option.
  • SSH: ECDSA X.509 certificates in SSH - Added support for 'x509v...