I know (without knowing exaclty wich ones) that there are settings on the Exchange server to allow/disallow some operations.

Better use the MAPI sample I linked you to.
You could also create a Outlook object (by automation - dim x as outlook) and send your message this way.

>thanks a lot before.. ok I got this message box:
>
>Connection is forcefully rejected .. FYI .. I use Ms. Exchange Server as my email server and its proven there is no problem... I mean I can send and receive email ..pls help TIA
>
>Winan