Search/Download only Encrypted Emails

Searching an IMAP mailbox for emails that are encrypted and download. Emails are automatically decrypted.

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Dim imap As New Chilkat.Imap()

Dim success As Boolean

'  Anything unlocks the component and begins a fully-functional 30-day trial.
success = imap.UnlockComponent("Anything for 30-day trial")
If (success <> true) Then
    MsgBox(imap.LastErrorText)
    Exit Sub
End If


'  Connect to an IMAP server.
success = imap.Connect("www.cknotes.com")
If (success <> true) Then
    MsgBox(imap.LastErrorText)
    Exit Sub
End If


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


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


'  An S/MIME encrypted email should have a content-type
'  header containing the substring "pkcs7-mime":
Dim headerSearch As String
headerSearch = "HEADER Content-Type pkcs7-mime"

Dim messageSet As Chilkat.MessageSet
Dim fetchUids As Boolean
fetchUids = true
messageSet = imap.Search(headerSearch,fetchUids)
If (messageSet Is Nothing ) Then
    MsgBox(imap.LastErrorText)
    Exit Sub
End If


'  Download the emails indicated in the messageSet.
'  The emails are automatically decrypted.
Dim bundle As Chilkat.EmailBundle
bundle = imap.FetchBundle(messageSet)
If (bundle Is Nothing ) Then

    MsgBox(imap.LastErrorText)
    Exit Sub
End If


'  Display some information from each email:
Dim i As Long
For i = 0 To bundle.MessageCount - 1
    Dim email As Chilkat.Email
    email = bundle.GetEmail(i)

    TextBox1.Text = TextBox1.Text & email.GetHeaderField("Date") & vbCrLf
    TextBox1.Text = TextBox1.Text & email.Subject & vbCrLf
    TextBox1.Text = TextBox1.Text & email.From & vbCrLf

    TextBox1.Text = TextBox1.Text & "Received Encrypted: " _
         & email.ReceivedEncrypted & vbCrLf
    If (email.ReceivedEncrypted = true) Then
        TextBox1.Text = TextBox1.Text & "Successfully Decrypted: " _
             & email.Decrypted & vbCrLf
    End If


    TextBox1.Text = TextBox1.Text & "Received Signed: " _
         & email.ReceivedSigned & vbCrLf
    If (email.ReceivedSigned = true) Then
        TextBox1.Text = TextBox1.Text & "Signature Verified: " _
             & email.SignaturesValid & vbCrLf
    End If


    TextBox1.Text = TextBox1.Text & "--" & vbCrLf


Next

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