SMTP OCX   
http://www.vb4all.net

The SMTP OCX is a an Advanced Active-X Control which integrates RAS and SMTP mail protocols into one easy to manage solution. The SMTP OCX allows you to send Email via any RFC compliant SMTP server which supports SMTP mail relaying. SMTP (Simple Mail Transfer Protocol) is one of the Internets standard technologies for sending email it allows you to send email quickly and simply without clogging up your internet connection / bandwidth. The SMTP OCX supports Multiple file attachments (any file attachment is supported text and binary) which it correctly Base64 encodes for maximum encryption/compression and security when transmitting (binary only). The SMTP OCX Also supports Straight Text or HTML messages, straight text can be viewed by all Email Viewers, HTML emails only support HTML compliant email viewers such as OE. The RAS aspects of the SMTP OCX control allow you to manage, enumerate or dial any connection(s) installed on the end user/your computer. SMTP OCX Feature List: Full Email properties (To, Cc, From, Subject, Message, Priority), *Straight Text or Full HTML sending Interface, *Multiple To, CC lists. *Multiple Attachments (any size, any type) Full SMTP Server properties (Server Name, Time Out), Advanced Error Processing and Reporting, Advanced Event System allowing direct Event reaction and Response to common actions such as Mail sending/failure and connection/disconnection, Automated Dialing (connect to the end users default RAS/DUN connection to send emails), Automated Internet Detection (Dial only if an existing connection is not present), Automated Connection Termination (Hang Up dialled connections once email has been sent), Connect directly to the RAS/DUN system to enumerate, edit and add any Entry, Dial or Disconnect any DUN/RAS Entry.

Narawen Inox POP3 Connector   
http://www.narawen.com

Narawen Inox POP3 Connector is mail gateway software delivering messages from Internet POP3 mailboxes to mailboxes located at your corporate messaging server such as Microsoft Exchange or IBM Lotus Domino. Application runs automaticallly in background as operating system service. Periodically it downloads all messages from POP3 mailboxes, routes them to recipients, and sends using SMTP protocol. Setup Wizard based on Microsoft Windows Installer standard, easy to use Administration Application, and comprehensive Help allow system administrators to install, configure and run Narawen Inox POP3 Connector in efficient way. Every customer receives 180-day Technical Support package which guarantees smooth deployment and constant access to newest software releases. Simple per-server licensing model without any additional costs on additional mailboxes makes investment costs fixed and effective.

wodSmtpServer   
http://www.weonlydo.com

WeOnlyDo! SmtpServer ActiveX control is a component that can be easily integrated into your applications to provide full non-relaying Smtp (Simple Mail Transfer Protocol) server implementation. All you need to do is to put it on VB form, call it's Start method and it's immediately accepting connections by your clients! It fully supports commands defined in RFC2821. Use your favorite mail client (such as Outlook Express or Eudora) to send mail to other users on your network . How? That's easy part: just put SmtpServer control on your form, add some code around and it's all setup to be used. If you dislike adding additional code - it's fine by Smtp. It will still work, and accept all emails but delete them immediately after user disconnects. But, if you define real filename on your disk, all the emails will be stored to that file. Still, if you want to make real Smtp server application, look no more for native support for socket related material - you just found it. Smtp server will deal with clients and connections - you must deal with messages. Once new user connects to your Smtp server, you need to provide some way of storing message posted by user to some file on disk, or just read it from Body property and store manually to, for example, database. This is really easy task. If you keep all the emails in separate files, that's just great for usage with WeOnlyDo! Smtp server. If you prefer to keep it in one large file - we will not argue about it. You can specify filename, make Smtp server Append to that file, and everything will still work just great. As a result, you will have one mailbox for each user just like on UNIX computers. Together with WeOnlyDo! Pop3 server, you can make powerful fully maintained mail service application that will share emails in your company, receive them from internet and anything else you can imagine. You can even create emails for your employees on the fly. You can make Smtp store to same files from where Pop3 reads them.

SocketTools Secure Library Edition   
http://www.catalyst.com

The SocketTools Secure Library Edition includes standard Windows dynamic link libraries (DLLs) which can be used in a wide variety of programming languages such as Visual Studio.NET, Visual C++, Visual Basic and Delphi. The SocketTools Library Edition API has over 800 functions which can be used to develop applications that meet a wide range of needs. SocketTools covers it all, including uploading and downloading files, sending and retrieving email, remote command execution, terminal emulation, and much more. The SocketTools Secure Library Edition also includes support for the industry standard Secure Sockets Layer (SSL) and Transport Security Layer (TLS) protocols which are used to ensure that data exchanged between the local system and a remote host is secure and encrypted. Your data is protected by industrial strength 128-bit encryption, with full support for client certificates. Using the popular SocketWrench library that is part of SocketTools, you can also write your own, custom secure server applications. And there's no need for you to understand the details of certificate management, data encryption or how the security protocols work. All it takes is a few lines of code to enable the security features, and SocketTools handles the rest! The following protocols are supported by the SocketTools Secure Library Edition: Domain Name Service (DNS), File Encoding and Compression, File Transfer Protocol (FTPS), Finger Protocol, Gopher Protocol, Hypertext Transfer Protocol (HTTPS), Internet Control Message Protocol (ICMP), Internet Message Access Protocol (IMAPS), Multipurpose Internet Mail Extensions (MIME), Network News Transfer Protocol (NNTPS), Network Time Protocol, Post Office Protocol (POP3S), Remote Access Services (RAS), Remote Command Protocol, Simple Mail Transfer Protocol (SMTPS), Terminal Emulation, Telnet Protocol, Whois Porotocol, Windows Sockets (SocketWrench).

SocketTools Secure Visual Edition   
http://www.catalyst.com

SocketTools Secure Visual Edition is a collection of controls that supports secure data connections over the Internet or a local network. It includes client interfaces for Secure Sockets Layer (SSL) compliant versions of the Hypertext Transfer Protocol (HTTPS), File Transfer Protocol (FTPS), Simple Mail Transfer Protocol (SMTPS) and other popular application protocols PLUS all the standard Visual Edition components. Almost all details of the standard SSL protocol are hidden within the controls, enabling developers to produce secure client applications with only small additional considerations beyond those needed for non-secure versions of those same applications. All versions of Visual Basic from 5.0 and later are supported, and the ActiveX controls can be used with any 32-bit development tool that supports COM and the ActiveX control specification. The following protocols are supported by the SocketTools Secure Visual Edition: Domain Name Service (DNS), File Encoding and Compression, File Transfer Protocol (FTPS), Finger Protocol, Gopher Protocol, Hypertext Transfer Protocol (HTTPS), Internet Control Message Protocol (ICMP), Internet Message Access Protocol (IMAPS), Multipurpose Internet Mail Extensions (MIME), Network News Transfer Protocol (NNTPS), Network Time Protocol, Post Office Protocol (POP3S), Remote Access Services (RAS), Remote Command Protocol, Simple Mail Transfer Protocol (SMTPS), Terminal Emulation, Telnet Protocol, Whois Porotocol, Windows Sockets (SocketWrench).