Communicating with a POP3 server in .NET
Overview
This article will demonstrate how to communicate with a POP3 server using Email Factory for .NET.
Code Example
Download licenseEmail.txt
| Download PopEx.cs | Download PopEx.vb
1: using System;
2: using System.Collections.Generic;
3: using System.Collections;
4: using System.Text;
5: using Jscape.Email;
6:
7: namespace POPNET
8: {
9: class PopEx
10: {
11: Pop pop = null;
12: public delegate void OnPopExEventHandler(string value);
13: public event OnPopExEventHandler OnPopEvent;
14:
15: public PopEx(string server, string username, string password)
16: {
17: pop = new Pop(server, username, password);
18: pop.LicenseKey = null; // copy license from license.txt here
19: pop.DeleteMessages = true;
20: pop.ConnectedEvent
21: += new Pop.ConnectedEventHandler(pop_ConnectedEvent);
22: pop.DisconnectedEvent
23: += new Pop.DisconnectedEventHandler(pop_DisconnectedEvent);
24: pop.DataReceivedEvent
25: += new Pop.DataReceivedEventHandler(pop_DataReceivedEvent);
26: }
27:
28: private void pop_DataReceivedEvent(object sender, PopDataReceivedEventArgs e)
29: {
30: OnPopEvent(e.Response);
31: }
32:
33: private void pop_DisconnectedEvent(object sender, PopDisconnectedEventArgs e)
34: {
35: Console.WriteLine("Disconnected from : " + e.Host);
36: }
37:
38: private void pop_ConnectedEvent(object sender, PopConnectedEventArgs e)
39: {
40: Console.WriteLine("Connected to : " + e.Host);
41: }
42:
43: public void openConnection()
44: {
45: pop.Connect();
46: }
47:
48: public void closeConnection()
49: {
50: pop.Disconnect();
51: }
52:
53: public void useAPOPAuthentication()
54: {
55: pop.AuthMode = Pop.AUTH_APOP;
56: }
57:
58: public string issuePopCommand(string cmd)
59: {
60: return pop.IssueCommand(cmd);
61: }
62:
63: public int getMessageCount()
64: {
65: return pop.GetMessageCount();
66: }
67:
68: public ArrayList getAllMessages()
69: {
70: ArrayList ret = new ArrayList();
71: IEnumerator e = pop.GetMessages();
72: while (e.MoveNext()) ret.Add((EmailMessage)e.Current);
73: return ret;
74: }
75:
76: public EmailMessage GetId(int id)
77: {
78: return pop.GetMessage(id);
79: }
80:
81: public void DeleteMessage(int id)
82: {
83: pop.DeleteMessage(id);
84: }
85:
86: static void Main(string[] args)
87: {
88: try
89: {
90: string server = "[server]";
91: string username = "[username]";
92: string password = "[password]";
93: PopEx pe = new PopEx(server, username, password);
94: pe.useAPOPAuthentication();
95: pe.openConnection();
96: pe.issuePopCommand("HELO 10.0.0.1");
97: pe.closeConnection();
98: }
99: catch (Exception e)
100: {
101: Console.WriteLine(e.Message);
102: }
103:
104: Console.WriteLine("Press any key to exit ... ");
105: Console.Read();
106: }
107: }
108: }
Lines 1-5 : Necessary import statements.
Lines 11-26 : Initialize Pop instance and connect event handlers.
Lines 28-36 : Methods to catch events from Pop instance.
Lines 43-51 : Methods to connect/disconnect from server.
Lines 53-56 : Use APOP authentication.
Lines 58-61 : Issue a command to the server.
Lines 68-74 : Get all messages from the server.
Lines 76-79 : Get message by id.
Lines 81-84 : Delete message by id.
Line 93 : Initialize PopEx instance.
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