Read Email Headers

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VB.NET sample code to read mail headers from a POP3 server.

textBox1.Text = ""

' Create a mailman object for reading email.
Dim mailman As New Chilkat.MailMan()

' Any string passed to UnlockComponent automatically begins a 30-day trial.
Dim success As Boolean
success = mailman.UnlockComponent("Hello World")
If (success <> true) Then
    MsgBox(mailman.LastErrorText)
    Exit Sub
End If

' Set our POP3 hostname, login and password
mailman.MailHost = "mail.chilkatsoft.com"
mailman.PopUsername = "login"
mailman.PopPassword = "password"

' Connecting via SSL is possible by adding these lines:
' All POP3 communications are secure using SSL.
'mailman.PopSsl = true;
' Set the POP3 port to 995, the standard MS Exchange Server SSL POP3 port.
'mailman.MailPort = 995;
' Use GetAllHeaders to fetch each email header and the 1st N lines of
' the body from a POP3 server. 
' Note: Attachment information will not be available.  This is a shortfall
' of the POP3 protocol because attachment information is not included
' in POP3 headers. An entire POP3 email must be read in order to get complete
' attachment information.
Dim bundle As Chilkat.EmailBundle = mailman.GetAllHeaders(2) ' Get 2 body lines...
If bundle Is Nothing Then
   MessageBox.Show(mailman.LastErrorText)
   Return
End If

Dim i As Integer
Dim n As Integer = bundle.MessageCount
For i = 0 To n - 1
   Dim email As Chilkat.Email = bundle.GetEmail(i)
   
   textBox1.Text = textBox1.Text + email.From + ControlChars.Cr + ControlChars.Lf
   textBox1.Text = textBox1.Text + email.Subject + ControlChars.Cr + ControlChars.Lf
Next i