Category Archives: News of TDNSC

Now TSSI .NET SMTP Component v2.0 Is Available

Hello everyone,

Now TSSI .NET SMTP Component v2.0 is available, you can feel free to upgrade your copy.

Please refer the following links to know more detail:
Official Page:
Direct download URL:

* Description

TSSI .NET SMTP Component (TDNSC) provides an easy way to enable your .NET Framework supported programming/scripting languages (e.g. C#, VB.NET, J#, C++, A#, F#, .NET Delphi, .NET COBOL, P#, S#, and more) to send PLAIN/RICH messages based on the SMTP/ESMTP protocol. It provides all the traditional email elements/functions and many advanced features such as sending emails via the PROXY SERVER (supports the popular SOCKS5 protocol), designating the different Sender / Reply Receiver / Read Receipt Receiver addresses than the From address, checking email address format, ESMTP logon test, sending progress / errors monitor (via the related events), customizing sending time, and so on.

* Key Features

+ Rich Text (HTML) eMail Body Supported
+ Proxy Connection & Related Authentication Supported
+ Multiple Recipients & Attachments
+ Embedded Images Supported (Local and Remote)
+ ESMTP Authentication
+ Secure User & Password Authentication
+ (E)SMTP Logon Test Before Sending
+ SSL / TLS Security SMTP Connection Supported
+ Automatic Email Encryption
+ Email Address Verification Utility
+ To / CC / BCC / Priority / Read Receipt
+ Custom Sender / Reply Receiver / Read Receipt Receiver / Sending Time
+ Complete Unicode Supported
+ Sending Errors Monitor via ErrorOccurred Event
+ Sending Progress Monitor via Progress Event
+ Supports .NET Framework 2.0, 3.0, 3.5, 4.0, 4.5 or Higher
+ Very Small Distribution Files (63 KB, If Compressed, Only 24 KB), and Much, Much More…

This version is a major upgrade, the updates as below:

* New Features:

  • Important: optimized the sending speed.
  • Important: supports the embedded images with “file:///…” format that generated by a few operating systems. Now, any embedded image will be shown in the receiver’s email client / webmail.
  • Important: uses the random “Message-ID” in the SMTP layer to avoid some email servers and / or ISPs treating your emails as junk or spam. Now, the delivery success rate is increased substantially.
  • Supports TLS security connection (such as Hotmail SMTP server, important feature).
  • Improved TLS protocol implementation (specially, supports Office 365 SMTP server (, important feature.
  • Supports test the logon of (E)SMTP server.
  • Complete Unicode supported.
  • Can send the remote embeded pictures (e.g. HTTP images) for HTML email.
  • Provides all the traditional email elements/functions and some distinctive elements/functions.
  • Supports sending emails via the proxy server.
  • Supports SSL security connection.
  • supports the long subject, the previous versions cannot process the subject that exceeded 52 characters.
  • Supports email format verification.
  • Supports to check new version.
  • Supports the Bcc feature fully.
  • No longer provide the RegCode property for TSMTP class, now, we will deliver your purchased edition by a .zip package.
  • Optimized the documentation.

* Bug Fixes

  • Important: if the email has not attachment, but has the embedded images, some webmail systems will display the attachment icon in their messages listing, such as, Gmail.
  • Important: webmail can display the local embedded images.
  • Sometimes, cannot send embedded pictures, background picture and sound (very important).
  • Cannot send email by the non-authentication SMTP server.