Delphi ActiveX

Get the Total Size of an IMAP Message

Demonstrates the Chilkat Imap.GetMailSize method, which returns the complete server-reported size of a message in bytes, including attachment data. The only argument is the Email. This example fetches only the headers and prints the full message size.

Background: The server reports each message's total size, so this value is available even when only the headers were downloaded. That lets a client show a size column in a message list, sort by size, or warn the user before downloading an unusually large message — all without fetching the full body first.

Chilkat Delphi ActiveX Downloads

Download Chilkat for Delphi ActiveX

Delphi ActiveX

var
success: Integer;
imap: TChilkatImap;
headersOnly: Integer;
useUid: Integer;
seqNum: Integer;
email: TChilkatEmail;
sizeBytes: Integer;

begin
success := 0;

//  Demonstrates the Imap.GetMailSize method, which returns the complete server-reported size
//  of a message in bytes, including attachments.  The only argument is the Email.

imap := TChilkatImap.Create(Self);

imap.Ssl := 1;
imap.Port := 993;

success := imap.Connect('imap.example.com');
if (success = 0) then
  begin
    Memo1.Lines.Add(imap.LastErrorText);
    Exit;
  end;
success := imap.Login('user@example.com','myPassword');
if (success = 0) then
  begin
    Memo1.Lines.Add(imap.LastErrorText);
    Exit;
  end;

success := imap.SelectMailbox('Inbox');
if (success = 0) then
  begin
    Memo1.Lines.Add(imap.LastErrorText);
    Exit;
  end;

//  Fetch only the message headers.  Attachment bodies are NOT downloaded, but the ckx-imap-*
//  metadata describing the attachments is present, so the attachment info methods still work.
headersOnly := 1;
useUid := 0;
seqNum := 1;
email := TChilkatEmail.Create(Self);
success := imap.FetchEmail(headersOnly,seqNum,useUid,email.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(imap.LastErrorText);
    Exit;
  end;

sizeBytes := imap.GetMailSize(email.ControlInterface);
Memo1.Lines.Add('Total message size: ' + IntToStr(sizeBytes) + ' bytes');

success := imap.Disconnect();
if (success = 0) then
  begin
    Memo1.Lines.Add(imap.LastErrorText);
    Exit;
  end;