(Visual Basic 6.0) Yahoo! IMAP (imap.mail.yahoo.com)

(from Wikipedia)

It is possible to get direct IMAP access without signing up for paid access nor using software like YPOPs! or FreePOPs. Yahoo! operates IMAP and secure IMAP servers (imap.mail.yahoo.com in particular), which are globally accessible. However they require a specific, non-standard IMAP command to be sent before login is done, namely: “ID ("GUID" "1")”.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

' This example assumes the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

Dim imap As New ChilkatImap

' Connect to they Yahoo! IMAP server.
imap.Port = 993
imap.Ssl = 1
Dim success As Long
success = imap.Connect("imap.mail.yahoo.com")
If (success <> 1) Then
    Debug.Print imap.LastErrorText
    Exit Sub
End If

' Send the non-standard ID command...
Dim rawResponse As String
rawResponse = imap.SendRawCommand("ID (""GUID"" ""1"")")
If (imap.LastMethodSuccess <> 1) Then
    Debug.Print imap.LastErrorText
    Exit Sub
End If

' Login
success = imap.Login("myLogin","myPassword")
If (success <> 1) Then
    Debug.Print imap.LastErrorText
    Exit Sub
End If

Debug.Print "Login Success!"

' Select an IMAP mailbox
success = imap.SelectMailbox("Inbox")
If (success <> 1) Then
    Debug.Print imap.LastErrorText
    Exit Sub
End If

' Continue with whatever you wish to do...
' (see other examples..)

' Disconnect from the IMAP server.
success = imap.Disconnect()