Delphi DLL

Fetch Single Email by UID or Sequence Number

Assuming the UID is known, download a single email by UID from an IMAP mail server. Delphi DLL

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Imap, Email;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
imap: HCkImap;
email: HCkEmail;
uid: Integer;
isUid: Boolean;
j: Integer;
numAttach: Integer;
attachSize: Integer;

begin
success := False;

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

imap := CkImap_Create();

// Connect to an IMAP server.
// Use TLS
CkImap_putSsl(imap,True);
CkImap_putPort(imap,993);
success := CkImap_Connect(imap,'imap.example.com');
if (success = False) then
  begin
    Memo1.Lines.Add(CkImap__lastErrorText(imap));
    Exit;
  end;

// Login
success := CkImap_Login(imap,'***','***');
if (success = False) then
  begin
    Memo1.Lines.Add(CkImap__lastErrorText(imap));
    Exit;
  end;

// Select an IMAP mailbox
success := CkImap_SelectMailbox(imap,'Inbox');
if (success = False) then
  begin
    Memo1.Lines.Add(CkImap__lastErrorText(imap));
    Exit;
  end;

email := CkEmail_Create();

uid := 2014;
isUid := True;

success := CkImap_FetchEmail(imap,False,uid,isUid,email);
if (success = False) then
  begin
    Memo1.Lines.Add(CkImap__lastErrorText(imap));
    Exit;
  end;

// Display the From and Subject
Memo1.Lines.Add(CkEmail__fromAddress(email));
Memo1.Lines.Add(CkEmail__subject(email));

// Display the Body property, which is the default body.
// If an email has an HTML body, the Body property contains
// the HTML source.  Otherwise it contains the plain-text
// body.
Memo1.Lines.Add('---- EMAIL BODY ----');
Memo1.Lines.Add(CkEmail__body(email));
Memo1.Lines.Add('--------------------');

// Display the recipients:

for j := 0 to CkEmail_getNumTo(email) - 1 do
  begin
    Memo1.Lines.Add(CkEmail__getToName(email,j) + ', ' + CkEmail__getToAddr(email,j));
  end;

for j := 0 to CkEmail_getNumCC(email) - 1 do
  begin
    Memo1.Lines.Add(CkEmail__getCcName(email,j) + ', ' + CkEmail__getCcAddr(email,j));
  end;

// Show the total size of the email, including body and attachments:
Memo1.Lines.Add(IntToStr(CkEmail_getSize(email)));

// When a full email is downloaded, we would use the
// email.NumAttachments property in conjunction with the
// email.GetMailAttach* methods.
// However, when an email object contains only the header,
// we need to access the attachment info differently:
numAttach := CkImap_GetMailNumAttach(imap,email);
Memo1.Lines.Add(IntToStr(numAttach));

for j := 0 to numAttach - 1 do
  begin
    Memo1.Lines.Add(CkImap__getMailAttachFilename(imap,email,j));
    attachSize := CkImap_GetMailAttachSize(imap,email,j);
    Memo1.Lines.Add('    size = ' + IntToStr(attachSize) + ' bytes');
  end;

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

// Disconnect from the IMAP server.
success := CkImap_Disconnect(imap);

CkImap_Dispose(imap);
CkEmail_Dispose(email);

end;