Bounced Email Handling

Download Chilkat Bounce ActiveX

Demonstrates how to examine emails and detect which are bounced (automated) replies. Classifies each email according to the type of bounce.

Download Chilkat Email ActiveX

Dim bounce As New ChilkatBounce

Dim success As Long
success = bounce.UnlockComponent("Anything for 30-day trial")
If (success = 0) Then
    MsgBox bounce.LastErrorText
    Exit Sub
End If

'  The mailman object is used for receiving (POP3)
'  and sending (SMTP) email.
Dim mailman As New ChilkatMailMan2

'  Any string argument automatically begins the 30-day trial.
success = mailman.UnlockComponent("30-day trial")
If (success <> 1) Then
    MsgBox mailman.LastErrorText
    Exit Sub
End If

'  Set the POP3 server's hostname
mailman.MailHost = "mail.chilkatsoft.com"

'  Set the POP3 login/password.
mailman.PopUsername = "myLogin"
mailman.PopPassword = "myPassword"

Dim bundle As ChilkatEmailBundle2
'  Copy the all email from the user's POP3 mailbox
'  into a bundle object.  The email remains on the server.
'  (There are other methods for deleting email from a POP3 server.)
Set bundle = mailman.CopyMail()

If (bundle Is Nothing ) Then
    MsgBox mailman.LastErrorText
    Exit Sub
End If

Dim i As Long
Dim email As ChilkatEmail2
For i = 0 To bundle.MessageCount - 1
    Set email = bundle.GetEmail(i)

    success = bounce.ExamineEmail(email)
    If (success = 0) Then
        MsgBox bounce.LastErrorText
        Exit Sub
    End If

    If (bounce.BounceType = 1) Then
        '  Hard bounce, log the email address
        Text1.Text = Text1.Text & "Hard Bounce: " _
             & bounce.BounceAddress & vbCrLf
    End If

    If (bounce.BounceType = 2) Then
        '  Soft bounce, log the email address
        Text1.Text = Text1.Text & "Soft Bounce: " _
             & bounce.BounceAddress & vbCrLf
    End If

    If (bounce.BounceType = 3) Then
        '  General bounce, no email address available.
        Text1.Text = Text1.Text & "General Bounce: No email address" & vbCrLf
    End If

    If (bounce.BounceType = 4) Then
        '  General bounce, log the email address
        Text1.Text = Text1.Text & "General Bounce: " _
             & bounce.BounceAddress & vbCrLf
    End If

    If (bounce.BounceType = 5) Then
        '  Mail blocked, log the email address
        '  A bounce occured because the sender was blocked.
        Text1.Text = Text1.Text & "Mail Blocked: " _
             & bounce.BounceAddress & vbCrLf
    End If

    If (bounce.BounceType = 6) Then
        '  Auto-reply, log the email address
        Text1.Text = Text1.Text & "Auto-Reply: " _
             & bounce.BounceAddress & vbCrLf
    End If

    If (bounce.BounceType = 7) Then
        '  Transient (recoverable) Failure, log the email address
        Text1.Text = Text1.Text & "Transient Failure: " _
             & bounce.BounceAddress & vbCrLf
    End If

    If (bounce.BounceType = 8) Then
        '  Subscribe request, log the email address
        Text1.Text = Text1.Text & "Subscribe Request: " _
             & bounce.BounceAddress & vbCrLf
    End If

    If (bounce.BounceType = 9) Then
        '  Unsubscribe Request, log the email address
        Text1.Text = Text1.Text & "Unsubscribe Request: " _
             & bounce.BounceAddress & vbCrLf
    End If

    If (bounce.BounceType = 10) Then
        '  Virus Notification, log the email address
        Text1.Text = Text1.Text & "Virus Notification: " _
             & bounce.BounceAddress & vbCrLf
    End If

    If (bounce.BounceType = 11) Then
        '  Suspected bounce.
        '  This should be rare.  It indicates that the Bounce
        '  component found strong evidence that this is a bounced
        '  email, but couldn't quite recognize everything it
        '  needed to be 100% sure.  Feel free to notify
        '  support@chilkatsoft.com regarding emails having this
        '  bounce type.
        Text1.Text = Text1.Text & "Suspected Bounce!" & vbCrLf
    End If

    If (bounce.BounceType = 12) Then
        '  Challenge/Response - Auto-reply message sent by SPAM software
        '  where only verified email addresses are accepted.
        Text1.Text = Text1.Text & "Challenge: " _
             & bounce.BounceAddress & vbCrLf
    End If

    If (bounce.BounceType = 13) Then
        '  Address Change Notification Message.
        Text1.Text = Text1.Text & "Address Change: " _
             & bounce.BounceAddress & vbCrLf
    End If

    If (bounce.BounceType = 14) Then
        '  Success DSN indicating that the message was successfully relayed.
        Text1.Text = Text1.Text & "DSN Successful Relay: " & vbCrLf
    End If

Next

mailman.Pop3EndSession