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C#/CSharp Example SSL connection encrypts data between the email component and POP3 server or IMAP4 server to protect user, password and email content in TCP/IP level. Now this technology is commonly used and many email servers are deployed with SSL such as Gmail, Yahoo and Hotmail. There are two ways to deploy SSL on email server: 1. Using STARTTLS or STLS command to switch SSL channel on normal port (POP3: 110 or IMAP4: 143); 2. Deploying SSL on another port (POP3: 995 or IMAP4: 993 you may query it from your server administrator) directly
The following example codes demonstrate how to retrieve email over SSL connection from POP3 server. This sample downloads emails from POP3 server and deletes the email after the email is retrieved.
Code:
// The following example codes demonstrate retrieving email over SSL connection from POP3 server
// To get full sample projects, please download and install EAGetMail on your machine.
// To run it correctly, please change email server, user, password, folder, file name value to yours
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
// Add EAGetMail namespace
using EAGetMail;
namespace receiveemail
{
class Program
{
static void Main(string[] args)
{
// Create a folder named "inbox" under current directory
// to save the email retrieved.
string curpath = Directory.GetCurrentDirectory();
string mailbox = String.Format("{0}\\inbox", curpath);
// If the folder is not existed, create it.
if (!Directory.Exists(mailbox))
{
Directory.CreateDirectory(mailbox);
}
MailServer oServer = new MailServer("pop3.emailarchitect.net",
"test@emailarchitect.net", "testpassword", ServerProtocol.Pop3 );
MailClient oClient = new MailClient("TryIt");
// Enable SSL connection
oServer.SSLConnection = true;
// Set 995 SSL POP3 port
oServer.Port = 995;
try
{
oClient.Connect(oServer);
MailInfo[] infos = oClient.GetMailInfos();
for (int i = 0; i < infos.Length; i++)
{
MailInfo info = infos[i];
Console.WriteLine("Index: {0}; Size: {1}; UIDL: {2}",
info.Index, info.Size, info.UIDL);
// Receive email from POP3 server
Mail oMail = oClient.GetMail(info);
Console.WriteLine("From: {0}", oMail.From.ToString());
Console.WriteLine("Subject: {0}\r\n", oMail.Subject);
// Generate an email file name based on date time.
System.DateTime d = System.DateTime.Now;
System.Globalization.CultureInfo cur = new
System.Globalization.CultureInfo("en-US");
string sdate = d.ToString("yyyyMMddHHmmss", cur);
string fileName = String.Format("{0}\\{1}{2}{3}.eml",
mailbox, sdate, d.Millisecond.ToString("d3"), i);
// Save email to local disk
oMail.SaveAs(fileName, true);
// Mark email as deleted from POP3 server.
oClient.Delete(info);
}
// Quit and pure emails marked as deleted from POP3 server.
oClient.Quit();
}
catch (Exception ep)
{
Console.WriteLine(ep.Message);
}
}
}
}
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