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ivan  
#1 Posted : Tuesday, April 12, 2011 4:47:24 AM(UTC)
ivan

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Visual Basic 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.

' 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

Code:

Imports System.IO 

' Imports EAGetMail namespace
Imports EAGetMail 

Module Module1 
    Sub Main() 
        ' Create a folder named "inbox" under current directory
        ' to save the email retrieved.
        Dim curpath As String = Directory.GetCurrentDirectory() 
        Dim mailbox As String = [String].Format("{0}\inbox", curpath) 

        ' If the folder is not existed, create it.
        If Not Directory.Exists(mailbox) Then 
            Directory.CreateDirectory(mailbox) 
        End If 

        Dim oServer As New MailServer("pop3.emailarchitect.net", _ 
            "test@emailarchitect.net", "testpassword", ServerProtocol.Pop3) 
        Dim oClient As New MailClient("TryIt") 

        ' Enable SSL Connection
        oServer.SSLConnection = True 

        ' Set 995 SSL POP3 port
        oServer.Port = 995 

        Try 
            oClient.Connect(oServer) 
            Dim infos As MailInfo() = oClient.GetMailInfos() 
            For i As Integer = 0 To infos.Length - 1 
                Dim info As MailInfo = infos(i) 
                Console.WriteLine("Index: {0}; Size: {1}; UIDL: {2}", _ 
                        info.Index, info.Size, info.UIDL) 

                ' Receive email from POP3 server
                Dim oMail As Mail = oClient.GetMail(info) 

                Console.WriteLine("From: {0}", oMail.From.ToString()) 
                Console.WriteLine("Subject: {0}" & vbCr & vbLf, oMail.Subject) 

                ' Generate an email file name based on date time.
                Dim d As System.DateTime = System.DateTime.Now 
                Dim cur As New System.Globalization.CultureInfo("en-US") 
                Dim sdate As String = d.ToString("yyyyMMddHHmmss", cur) 
                Dim fileName As String = [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) 
            Next 

            ' Quit and pure emails marked as deleted from POP3 server.
            oClient.Quit() 
        Catch ep As Exception 
            Console.WriteLine(ep.Message) 
        End Try 

    End Sub 
End Module 

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