"MH" wrote:

> I'm trying to send CDO messages from IIS5 (.asp page) to an Exchange 2003 sp1
> server. I can send mail via telnet and via Outlook Express from the IIS
> server to the Exchange server without problem. My SMTP log shows the
> following:
>
> OutboundConnectionResponse -
> 220+.xxx.com+Microsoft+ESMTP+MAIL+Service,+Version:+6.0.3790.1830+ready+at++Mon,+13+Nov+2006+18:38:54+-0500+ 0 0 121
> OutboundConnectionCommand EHLO xxx-apps1.xxx.com 0 0 4
> OutboundConnectionResponse - 250-.xxx.com+Hello+[10.10.100.54] 0 0 46
> OutboundConnectionCommand MAIL FROM:<user@xxx.com>+SIZE=692 0 0 4
> OutboundConnectionResponse - 250+2.1.0+user@xxx.com....Sender+OK 0 0 37
> OutboundConnectionCommand RCPT TO:<user@xxx.com> 0 0 4
> OutboundConnectionResponse - 250+2.1.5+user@xxx.com+ 0 0 38
> OutboundConnectionCommand BDAT 692+LAST 0 0 4
>
> The message is never delivered, but the Exchange server delivers the
> following message after the timeout period to the sender address (which is
> the same as the receiver address):
> Your mail message could not be delivered, or may have encountered some
> trouble in the delivery process.
>
> I've looked for hours online and tried changing numerous settings without
> luck. Any suggestions? Many, many thanks in advance.