C# Network Programming

E-mail Basics Almost all Internet e-mail packages use the Unix e-mail model to implement electronic messaging with remote hosts. This model has become the most popular and widely implemented technique of delivering messages both to local cus...

SMTP and Windows The .NET mail library uses the Microsoft CDOSYS message component to send messages to remote hosts using SMTP. One significant area of confusion is when and how Windows OSes provide support for CDOSYS and how the CDOSYS rela...

The SmtpMail Class The SmtpMail class, found in the System.Web.Mail namespace, allows you to send SMTP messages in your C# network programs. This section discusses the methods and properties of the SmtpMail class and shows some examples of t...

Using Expanded Mail Message Formats With the popularity of e-mail came compatibility problems. Many e-mail systems had their own way of formatting mail messages. It wasn’t long before a standard e-mail message format was created, allow...

Mail Attachments You may have noticed that the Body property allows you only to enter text, and a separate property is used to include file attachments. This arrangement is the result of how SMTP works and how mail servers must handle binary...

The MailAttachment Class To simplify e-mail attachments, the .NET library includes the MailAttachment class. This class specifies the content and format of any attachments that are included in the mail message. There are two constructors th...

A POP3 Client Now that you know everything there is to know about sending SMTP messages using C#, you might want to know how to retrieve messages from mailboxes. As mentioned in the “E-mail Basics” section, the MUA program is re...

Summary This chapter tells you how to create network programs that handle network mail. Most network mail systems divide the mail function into three parts: the Mail Transfer Agent (MTA) delivers messages to local and remote users using the ...