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VB6 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 IMAP4 server. This sample downloads emails from IMAP4 server and deletes the email after the email is retrieved.
Code:
' The following example codes demonstrate retrieving email over SSL connection from IMAP4 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
Option Explicit
Const MailServerPop3 = 0
Const MailServerImap4 = 1
Private Sub Command1_Click()
Dim curpath As String
Dim mailbox As String
Dim oTools As New EAGetMailObjLib.Tools
' Create a folder named "inbox" under current directory
' to save the email retrieved.
curpath = App.Path
mailbox = curpath & "\inbox"
oTools.CreateFolder mailbox
Dim oServer As New EAGetMailObjLib.MailServer
oServer.Server = "imap.emailarchitect.net"
oServer.User = "test@emailarchitect.net"
oServer.Password = "testpassword"
oServer.Protocol = MailServerImap4
' Enable SSL connection
oServer.SSLConnection = True
' Set 993 SSL IMAP4 port
oServer.Port = 993
On Error GoTo ErrorHandle:
Dim oClient As New EAGetMailObjLib.MailClient
oClient.LicenseCode = "TryIt"
oClient.Connect oServer
MsgBox "Connected"
Dim infos
infos = oClient.GetMailInfos()
MsgBox UBound(infos) + 1 & " emails"
Dim i As Integer
For i = LBound(infos) To UBound(infos)
Dim info As EAGetMailObjLib.MailInfo
Set info = infos(i)
MsgBox "Index: " & info.Index & "; Size: " & info.Size & _
"; UIDL: " & info.UIDL
' Receive email from IMAP4 server
Dim oMail As EAGetMailObjLib.Mail
Set oMail = oClient.GetMail(info)
MsgBox "From: " & oMail.From.Address & _
vbCrLf & "Subject: " & oMail.Subject
Dim fileName As String
' Generate a random file name by current local datetime,
' You can use your method to generate the filename if you do not like it
fileName = mailbox & "\" & oTools.GenFileName(i) & ".eml
' Save email to local disk
oMail.SaveAs fileName, True
' Mark email as deleted from IMAP4 server.
oClient.Delete info
Next
' Quit and pure emails marked as deleted from IMAP4 server.
oClient.Quit
Exit Sub
ErrorHandle:
MsgBox Err.Description
End Sub
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