Library tutorials & articles
How to POP3 in C#
Getting Started
I usually begin writing new classes by introducing an exception class that I can use to throw and catch all exceptions of the class.
public class Pop3Exception : System. ApplicationException
{
public Pop3Exception( string str)
: base( str)
{
}
}
I will not explain the exception class, but rather I expect the reader have enough expertise with C# to understand this exception class before reading the rest of the article.
Next I created a small class that defines a POP3 message.
public class Pop3Message
{
public long number;
public long bytes;
public bool retrieved;
public string message;
}
When you retrieve lists of POP3 messages from a POP3 server, the list includes
a message number and number of bytes. You can then use the message number to
retrieve the message content. You'll see this later when we define our List
and Retrieve methods. We derive our Pop3 class from the System. Net.Sockets.TcpClient class
in the .NET framework.
public class Pop3 : System.Net.Sockets.TcpClient {
The TcpClient class and the other classes in the System.Net.Sockets namespace
of the .NET framework are great encapsulations of the familiar function-oriented
socket library.
Randy's article are Copyright 1998-2003 Randy Charles Morin
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When i change the port to 587 from 110 i got the following error
220 mx.google.com ESMTP g14sm11215098rvb.54
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