Pop3 Class

public class Pop3 : Component, INetClient

Public Class Pop3
   Inherits Component
   Implements INetClient

public ref class Pop3 : public Component, INetClient

Remarks

Shows how to connect to a POP3 server and list recent messages.

using System;
using System.Text;
using ComponentPro.Net.Mail;

...

// Create a new instance of the Pop3 class.
Pop3 client = new Pop3();

// Connect to the server.
client.Connect("myserver");

// Or you can specify the POP3 port with 
// client.Connect("myserver", 110); 
 
// Login to the server.
client.Authenticate("user", "password");

StringBuilder sb = new StringBuilder();

Pop3MessageCollection list = client.ListMessages(Pop3EnvelopeParts.Size | Pop3EnvelopeParts.UniqueId);
for (int i = 0; i < list.Count; i++)
{
    sb.AppendFormat("{0} - {1}\r\n", i + 1, list[i].UniqueId);
}

Console.WriteLine(sb.ToString());

// Close the connection.
client.Disconnect();

Imports System.Text
Imports ComponentPro.Net.Mail

...

' Create a new instance of the Pop3 class. 
Dim client As New Pop3()

' Connect to the server.
client.Connect("myserver")

' Or you can specify the POP3 port with 
' client.Connect("myserver", 110); 
 
' Login to the server.
client.Authenticate("user", "password")

Dim sb As New StringBuilder()

Dim list As Pop3MessageCollection = client.ListMessages(Pop3EnvelopeParts.Size Or Pop3EnvelopeParts.UniqueId)
For i As Integer = 0 To list.Count - 1
    sb.AppendFormat("{0} - {1}" & vbCrLf, i + 1, list(i).UniqueId)
Next i

Console.WriteLine(sb.ToString())

' Close the connection.
client.Disconnect()

Reference