Return receipt problem

Hi,

I have setup a domino server 6.5 on a windows 2k server SP4.

When i send a email with return receipt, i always says me, that the destination doesn’t support return receipt notification.

I have configure the server is DSN inbound and outbound, and the return receipt with use disposition-notification to.

Can someone help me.

Subject: RETURN RECEIPT PROBLEM

If the messages are going over the internet are you sure that the receiving server supports return receipts over the internet?