Fetch a Range of POP3 Messages

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Demonstrates the Chilkat MailMan.FetchRange method, which retrieves a range of messages from the POP3 mailbox and appends them to an EmailBundle. The arguments are keepOnServer, headersOnly, numBodyLines, a zero-based inclusive startIndex and endIndex, and the EmailBundle. This example fetches the first five messages.

var
success: Boolean;
mailman: HCkMailMan;
bundle: HCkEmailBundle;
n: Integer;
email: HCkEmail;
i: Integer;

begin
success := False;

//  Demonstrates the MailMan.FetchRange method, which retrieves a range of messages from the
//  POP3 mailbox and appends them to an EmailBundle.  The arguments are keepOnServer,
//  headersOnly, numBodyLines, startIndex, endIndex, and the EmailBundle.  The indexes are
//  zero-based and inclusive.

mailman := CkMailMan_Create();

//  Configure the POP3 server connection.
CkMailMan_putMailHost(mailman,'pop.example.com');
CkMailMan_putMailPort(mailman,995);
CkMailMan_putPopSsl(mailman,True);
CkMailMan_putPopUsername(mailman,'user@example.com');
CkMailMan_putPopPassword(mailman,'myPassword');

//  Fetch the first 5 messages (indexes 0 through 4), full bodies, leaving them on the server.
//  keepOnServer=1, headersOnly=0 (fetch the entire message).
//  Note: numBodyLines only applies when headersOnly is 1 (it sets how many lines of the
//  body to include along with the headers).  When headersOnly is 0, the entire message
//  is fetched and numBodyLines is ignored.
bundle := CkEmailBundle_Create();

success := CkMailMan_FetchRange(mailman,True,False,0,0,4,bundle);
if (success = False) then
  begin
    Memo1.Lines.Add(CkMailMan__lastErrorText(mailman));
    Exit;
  end;

n := CkEmailBundle_getMessageCount(bundle);
Memo1.Lines.Add('Fetched ' + IntToStr(n) + ' messages.');

email := CkEmail_Create();

for i := 0 to n - 1 do
  begin
    success := CkEmailBundle_EmailAt(bundle,i,email);
    Memo1.Lines.Add(CkEmail__subject(email));
  end;

//  Note: Explicitly connecting/authenticating is optional.  Chilkat MailMan automatically
//  connects and authenticates -- using the property settings above -- whenever a server
//  operation requires it.  Calling the explicit connect/authenticate methods can still be
//  helpful to determine whether a failure occurs while connecting or while authenticating.

CkMailMan_Dispose(mailman);
CkEmailBundle_Dispose(bundle);
CkEmail_Dispose(email);