[Lazarus] help with NNTP posting

[duilio foschi]

I cannot understand how I can post a message into a newsgroup using INet
components.

I can connect, authenticate, join a group and issue several commands like
ARTICLE
BODY
HEAD
XOVER

However, when I try to post a message, my code always returns 500 (unknown
command or wrong syntax).

Any help?

This is what I do (after connecting and authenticating):

uses
...lNet, lclnet, lnetcomponents, LConvEncoding;

var
   aStream:TMemoryStream;      // correctly initialized elsewhere
   aclient:TLTCPComponent;     // correctly initialized elsewhere

procedure LineToStream(Buf : String);
begin
   Buf := Buf + #13#10;
   aStream.WriteBuffer(Buf[1], Length(Buf));
end;

procedure TfrmUReader.btnSendPostClick(Sender: TObject);
var
   a:integer;
begin
   aStream.Clear;
   LineToStream('POST');
   LineToStream('"peppepolpo" <octopushole at gmail.com>');
   LineToStream('Newsgroups: it.hobby.fai-da-te');
   LineToStream('Subject: test 201937');
   LineToStream('Organization: None');
   LineToStream('X-Newsreader: DIY component ');

   { End of header is a blank line }
   LineToStream('');

   { Write the message body }
   LineToStream('');
   LineToStream('test 201937');


   aStream.Seek(0, soFromBeginning );

   a:=aclient.Send(aStream, aStream.Size);

   // a=500 here
end;
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