• Building a web based email interface
• Monitoring mail servers
• Building an intranet mail application
• Building a webservce to expose POP3 functionality
• Building a winform email client

[C#]

 
POP3 pop = new POP3( "127.0.0.1", "dave@blah.com", "mypassword");
 
 //if we have 
write permissions we can log the session 
pop.LogPath = "c:\\aspNetPOP3.log";
pop.LogOverwrite = true;
 
 //if we don't have write permissions 
 //(as in an ASP.NET application, we can maintain the log in memory)
pop.LogInMemory = true;
 
 //connect to the POP3 server
 pop.Connect();
 
 //get the number of messages and the size of the inbox
pop.PopulateInboxStats();
 
Console.WriteLine( "There are {0} messages waiting.", pop.InboxMessageCount );
Console.WriteLine( "The total inbox size is {0} bytes.", pop.InboxSize );
 
 //get a message
 string text = pop.GetMessageAsText( 1 );
 
 //show the message
Console.WriteLine( text );
 
 //Close the POP3 Connection
pop.Disconnect();
 
 //display the log 
Console.WriteLine( "Log----");
Console.WriteLine( pop.Log );

[VB.NET]

Dim pop As New POP3("127.0.0.1", "dave@blah.com", "mypassword")

'if we have write permissions we can log the session
pop.LogPath = "c:\aspNetPOP3.log"
pop.LogOverwrite = True

'if we don't have write permissions
'(as in an ASP.NET application, we can maintain the log in memory)
pop.LogInMemory = True

'connect to the POP3 server
pop.Connect()

'get the number of messages and the size of the inbox
pop.PopulateInboxStats()

Console.WriteLine("There are {0} messages waiting.", pop.InboxMessageCount)
Console.WriteLine("The total inbox size is {0} bytes.", pop.InboxSize)

'get a message
Dim emailText As String = pop.GetMessageAsText(1)

'show the message
Console.WriteLine(emailText)

'Close the POP3 Connection
pop.Disconnect()

[C#]

POP3 pop = new POP3( "127.0.0.1", "dave@blah.com", "mypassword");

//if we have write permissions we can log the session
pop.LogPath = "c:\\aspNetPOP3.log";
pop.LogOverwrite = true;

//if we don't have write permissions 
//(as in an ASP.NET application, we can maintain the log in memory)
pop.LogInMemory = true;

//connect to the POP3 server
pop.Connect();

//get the number of messages and the size of the inbox
pop.PopulateInboxStats();

Console.WriteLine( "There are {0} messages waiting.", pop.InboxMessageCount );
Console.WriteLine( "The total inbox size is {0} bytes.", pop.InboxSize );


//Close the POP3 Connection
pop.Disconnect();

//display the log
Console.WriteLine( "Log----");
Console.WriteLine( pop.Log );

[Visual Basic]

POP3 pop = new POP3( "127.0.0.1", "dave@blah.com", "mypassword");

//if we have write permissions we can log the session
pop.LogPath = "c:\\aspNetPOP3.log";
pop.LogOverwrite = true;

//if we don't have write permissions 
'(as in an ASP.NET application, we can maintain the log in memory)
pop.LogInMemory = true;

//connect to the POP3 server
pop.Connect();

//get the number of messages and the size of the inbox
pop.PopulateInboxStats();

Console.WriteLine( "There are {0} messages waiting.", pop.InboxMessageCount );
Console.WriteLine( "The total inbox size is {0} bytes.", pop.InboxSize );


//Close the POP3 Connection
pop.Disconnect();

//display the log
Console.WriteLine( "Log----");
Console.WriteLine( pop.Log );

• HeaderList()
• HeaderTable()


Below are two code samples that demonstrate the HeaderList() method.

[C#]

POP3 pop = new POP3();

//connect to the POP3 server
pop.Connect("dave@blah.com", "mypassword","127.0.0.1" );

//get a datatable of headers
ArrayList al = pop.HeaderList();

for( int i=0;i<al.Count;i++)
{
    Console.WriteLine("-------------------------------");
    Console.WriteLine( al[i].ToString() );
}

//Close the POP3 Connection
pop.Disconnect();

[Visual Basic]

Dim pop As New POP3()

'connect to the POP3 server
pop.Connect("dave@blah.com", "mypassword", "127.0.0.1")

'get a datatable of headers
Dim al As ArrayList = pop.HeaderList()

Dim i As Integer
For i = 0 To al.Count - 1
    Console.WriteLine("-------------------------------")
    Console.WriteLine(al(i).ToString())
Next i

'Close the POP3 Connection
pop.Disconnect()
            

[C#]

//create a new pop3 object
POP3 pop = new POP3("127.0.0.1","dave@blah.com", "mypassword" );

//connect to the POP3 server
pop.Connect();
            
//download the headers for messages 3 - 5 (inclusive)
DataTable dt = pop.HeaderTable(3, 5);


//Close the POP3 Connection
pop.Disconnect();


//html encode the cells
for( int r=0;r<dt.Rows.Count;r++)
{
    //skip the first col because it's an Int32
    for( int c=1;c<dt.Columns.Count;c++)
    {
        string cellValue = dt.Rows[r][c].ToString();
        dt.Rows[r][c] = "<pre>" + Server.HtmlEncode( cellValue ) + "</pre>";
    }
}

//display the datagrid in ASP.NET page
DataGrid dg = new DataGrid();
dg.DataSource = dt;
dg.DataBind();
Page.Controls.Add( dg );

[Visual Basic]

'create a new pop3 object
Dim pop As New POP3("127.0.0.1", "dave@blah.com", "mypassword")

'connect to the POP3 server
pop.Connect()

'get the messages 3-5 (includes message 3,4, and 5 ) as a DataTable            
Dim dtMsg As DataTable = pop.MessageTable(3, 5)

'Close the POP3 Connection
pop.Disconnect()


'html encode the cells
Dim r As Integer
For r = 0 To dtMsg.Rows.Count - 1
    'skip the first col because it's an Int32
    Dim c As Integer
    For c = 1 To dtMsg.Columns.Count - 1
        Dim cellValue As String = dtMsg.Rows(r)(c).ToString()
        dtMsg.Rows(r)(c) = "<pre>" + Server.HtmlEncode(cellValue) + "</pre>"
    Next c
Next r

'display the  DataTable in a DataGrid in an ASP.NET page
Dim dgMsg As New DataGrid()
dgMsg.DataSource = dtMsg
dgMsg.DataBind()
Page.Controls.Add(dgMsg)

[C#]

//create a new pop3 object
POP3 pop = new POP3("127.0.0.1","dave@blah.com", "mypassword" );

//connect to the POP3 server
pop.Connect();
            
Message msg = pop.GetMessage(1 );

//save attachments to a directory
msg.SaveAttachments( "c:\\temp\\mydirectory\\", true );

pop.Disconnect();

//done
Console.WriteLine( "done.");
Console.ReadLine( );
            

[Visual Basic]

'create a new pop3 object
Dim pop As New POP3("127.0.0.1", "dave@blah.com", "mypassword")

'connect to the POP3 server
pop.Connect()

Dim msg As Message = pop.GetMessage(1)

'save attachments to a directory
msg.SaveAttachments("c:\temp\mydirectory\", True)

pop.Disconnect()

'done
Console.WriteLine("done.")
Console.ReadLine()