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Article: Understanding COM References in Delphi

Search/Download only Encrypted Emails

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

Download Chilkat IMAP ActiveX

uses
    Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
    Dialogs, StdCtrls,
    CHILKATMAILLib2_TLB,
    CHILKATIMAPLib_TLB,
    OleCtrls;

...

procedure TForm1.Button1Click(Sender: TObject);
var
imap: TChilkatImap;
success: Integer;
headerSearch: String;
messageSet: CHILKATIMAPLib_TLB.IMessageSet;
fetchUids: Integer;
bundle: CHILKATIMAPLib_TLB.IChilkatEmailBundle2;
i: Integer;
email: CHILKATMAILLib2_TLB.IChilkatEmail2;

begin
imap := TChilkatImap.Create(Self);

//  Anything unlocks the component and begins a fully-functional 30-day trial.
success := imap.UnlockComponent('Anything for 30-day trial');
if (success <> 1) then
  begin
    ShowMessage(imap.LastErrorText);
    Exit;
  end;

//  Connect to an IMAP server.
success := imap.Connect('www.cknotes.com');
if (success <> 1) then
  begin
    ShowMessage(imap.LastErrorText);
    Exit;
  end;

//  Login
success := imap.Login('myLogin','myPassword');
if (success <> 1) then
  begin
    ShowMessage(imap.LastErrorText);
    Exit;
  end;

//  Select an IMAP mailbox
success := imap.SelectMailbox('Inbox');
if (success <> 1) then
  begin
    ShowMessage(imap.LastErrorText);
    Exit;
  end;

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

fetchUids := 1;
messageSet := imap.Search(headerSearch,fetchUids);
if (messageSet = nil ) then
  begin
    ShowMessage(imap.LastErrorText);
    Exit;
  end;

//  Download the emails indicated in the messageSet.
//  The emails are automatically decrypted.

bundle := imap.FetchBundle(messageSet);
if (bundle = nil ) then
  begin

    ShowMessage(imap.LastErrorText);
    Exit;
  end;

//  Display some information from each email:

for i := 0 to bundle.MessageCount - 1 do
  begin

    email := bundle.GetEmail(i) As CHILKATMAILLib2_TLB.IChilkatEmail2;

    Memo1.Lines.Add(email.GetHeaderField('Date'));
    Memo1.Lines.Add(email.Subject);
    Memo1.Lines.Add(email.From);

    Memo1.Lines.Add('Received Encrypted: ' + IntToStr(email.ReceivedEncrypted));
    if (email.ReceivedEncrypted = 1) then
      begin
        Memo1.Lines.Add('Successfully Decrypted: '
             + IntToStr(email.Decrypted));
      end;

    Memo1.Lines.Add('Received Signed: ' + IntToStr(email.ReceivedSigned));
    if (email.ReceivedSigned = 1) then
      begin
        Memo1.Lines.Add('Signature Verified: '
             + IntToStr(email.SignaturesValid));
      end;

    Memo1.Lines.Add('--');

  end;

//  Disconnect from the IMAP server.
imap.Disconnect();


end;

 

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