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ivan  
#1 Posted : Wednesday, April 13, 2011 4:50:55 AM(UTC)
ivan

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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.

STLS command can switch normal POP3 connection to SSL connection. The following example codes demonstrate how to retrieve email over TLS 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 TLS 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 110 POP3 Port
            oServer.Port = 110; 

            // Set TLS connection type
            oServer.SSLType = SSLConnectType.ConnectTLS; 

            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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If you have any comments or questions about above example codes, please add your comments here.
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